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Journal articles on the topic 'Angle of rotation of the plane of polarization'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Andreeva, M. A., and R. A. Baulin. "SHIFTS OF THE KIESSIG OSCILLATIONS AND FARADAY ROTATION FOR X-RAY REFLECTIVITY FROM A MAGNETIZED FILM." Кристаллография 68, no. 3 (2023): 376–84. http://dx.doi.org/10.31857/s0023476123700078.

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Appearance of the refraction effects and Faraday rotation of the plane of polarization of linearly polarized X rays has been analyzed for transmission and reflection at grazing incidence angles for a resonant film with allowance for the X-ray magnetic or Mössbauer scattering. It is shown that, when the magnetization is oriented along the radiation beam direction, magnetic additives to the susceptibility do not affect the phase shifts between the waves reflected from the surface and the substrate; however, they induce “orthogonal polarization” in the reflected beam, which corresponds to rotatio

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2

Cohen, M. H., and T. Savolainen. "180° rotations in the polarization angle for blazars." Astronomy & Astrophysics 636 (April 2020): A79. http://dx.doi.org/10.1051/0004-6361/201936907.

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Rotations of the electric vector position angle (EVPA) in blazars are often close to an integral multiple of 180°. There are many examples of this in the literature, and we strengthen the evidence by showing that, in the RoboPol monitoring program, nπ rotations occur more frequently than otherwise expected by chance. We explain this using a model consisting of two polarized emission components: a “jet” that is constant in time and a “burst” that is variable. The EVPA of the combination is EVPAjet at both the beginning and the end of the burst, so the net rotation across the burst must be nπ. S

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3

Oganesyan, Koryun B., Krzysztof Dzierżęga, Ashot H. Gevorgyan, Michal Hnatic, and Peter Kopcansky. "Plasma local diagnostics by polarimetric method." Laser Physics Letters 20, no. 5 (2023): 056002. http://dx.doi.org/10.1088/1612-202x/accdd4.

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Abstract We study the polarization plane rotation of weak probe signal in the field of strong electromagnetic waves in the presence of an external magnetic field of plasma, the polarization plane stimulated rotation angle of the probe signal in the intense laser field and in plasma is calculated. The estimates of the residual gas local density in a cesium plasma based on the effects of Faraday, Cotton–Mouton and stimulated rotation of the probe signal in the intense laser field have been found. It is shown, that the rotation angle in the cesium plasma medium has a complex structure.

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Oganesyan, Koryun B., Krzysztof Dzierżęga, Peter Kopcansky, Ashot H. Gevorgyan, and Milan Timko. "Polarimetric method of plasma diagnostics." Laser Physics Letters 19, no. 9 (2022): 096001. http://dx.doi.org/10.1088/1612-202x/ac7f38.

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Abstract The polarization plane rotation angle of a probe signal in plasma is calculated. The estimates of the residual gas average density and the average magnitude of the magnetic field in a cesium plasma based on the effects of Faraday and Cotton–Mouton in a probe laser field have been found. It is shown that the polarization plane rotation angle depends on resonance detuning of the incident laser wave and transition frequency of medium atoms, magnetic field strength and matrix element.

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Sokolov, Stanislav. "CHANCES OF WRONG INFORMATION RECEPTION DURING ELECTROMAGNETIC INFLUENCE UPON OPTICAL CABLE." SYNCHROINFO JOURNAL 9, no. 2 (2023): 26–29. http://dx.doi.org/10.36724/2664-066x-2023-9-2-26-29.

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Long-distance communication lines are optical fiber lines in most cases now. This moment PM QPSK system (polarization-division multiplex with quadrature phase shift keying) appear. Polarization-division multiplex uses a fact that the optical signal can propagate as two orthogonal polarized modes that allows to use the modes independently and makes it possible to double carrier capacity (together with already other used multiplex system). Two orthogonal waves using in the same fiber can cause problems during lightning discharges close by cable line. Under influence of external cross electrical

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Wu, Bi-Yuan, Zhang-Xing Shi, Feng Wu, Ming-Jun Wang та Xiao-Hu Wu. "Strong chirality in twisted bilayer α-MoO₃". Chinese Physics B 31, № 4 (2022): 044101. http://dx.doi.org/10.1088/1674-1056/ac3740.

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Chiral structures are promising in many applications, such as biological sensing and analytical chemistry, and have been extensively explored. In this paper, we theoretically investigate the chiral response of twisted bilayer α-MoO3. Firstly, the analytical formula for the transmissivity is derived when the structure is illuminated with circularly polarized plane waves. Furthermore, the results demonstrate that the twisted bilayer α-MoO3 can excite the strong chirality with the maximum circular dichroism (CD) of 0.89. In this case, the chirality is due to the simultaneous breaking the rotation

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7

Zhou, Qi-Qi, Shuang-Xi Yi, Jun-Jie Wei, and Xue-Feng Wu. "Constraints on Lorentz Invariance Violation with Multiwavelength Polarized Astrophysical Sources." Galaxies 9, no. 2 (2021): 44. http://dx.doi.org/10.3390/galaxies9020044.

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Possible violations of Lorentz invariance (LIV) can produce vacuum birefringence, which results in a frequency-dependent rotation of the polarization plane of linearly polarized light from distant sources. In this paper, we try to search for a frequency-dependent change of the linear polarization angle arising from vacuum birefringence in the spectropolarimetric data of astrophysical sources. We collect five blazars with multiwavelength polarization measurements in different optical bands (UBVRI). Taking into account the observed polarization angle contributions from both the intrinsic polariz

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8

Kamanina, Natalia, Andrey Toikka, and Svetlana Likhomanova. "Novel and Classical Materials Used in the Plane of Polarization of Light Rotation: Liquid Crystal with WS2 Nanotubes." Crystals 12, no. 9 (2022): 1185. http://dx.doi.org/10.3390/cryst12091185.

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It is well known that among the materials used in the daily lives of individuals and also in industrial applications, the specific structures applied in biomedicine occupy a special place. It is connected with the possibility to expand our basic physical-chemical knowledge and regarded to the real application of novel structures in the interdisciplinary arena. In this paper, a comparative study is conducted on the influence of different materials: sugar, DNA, WS2 nanoparticles, dyes—on the rotation of the plane of polarization of light. Firstly, this effect is shown namely for a liquid crystal

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9

Oganesyan, K. B., K. Dzierzega, A. H. Gevorgyan, and P. Kopcansky. "Stimulated magneto-optics with different detunings for plasma local diagnostics." Laser Physics Letters 21, no. 6 (2024): 066001. http://dx.doi.org/10.1088/1612-202x/ad45da.

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Abstract The polarization plane stimulated rotation angle of a probe signal in an intense laser field in plasma is calculated for arbitrary detunings of intense and weak laser waves compared with the resonant transition frequency of the medium. Estimates of the residual gas local density in a cesium plasma have been found based on the Faraday, Cotton–Mouton effects and on the effect of stimulated rotation of the polarization plane of the probe signal in an intense laser field. It is shown that the rotation in the medium has a complex structure consisting of the sum of only the influence of the

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10

Bockhorst, Tobias, and Uwe Homberg. "Amplitude and dynamics of polarization-plane signaling in the central complex of the locust brain." Journal of Neurophysiology 113, no. 9 (2015): 3291–311. http://dx.doi.org/10.1152/jn.00742.2014.

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The polarization pattern of skylight provides a compass cue that various insect species use for allocentric orientation. In the desert locust, Schistocerca gregaria, a network of neurons tuned to the electric field vector ( E-vector) angle of polarized light is present in the central complex of the brain. Preferred E-vector angles vary along slices of neuropils in a compasslike fashion (polarotopy). We studied how the activity in this polarotopic population is modulated in ways suited to control compass-guided locomotion. To this end, we analyzed tuning profiles using measures of correlation b

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Silant’ev, N. A., G. A. Alekseeva, and Yu K. Ananjevskaja. "New explanation of opposite position angles in red and blue wings of spectral lines." Monthly Notices of the Royal Astronomical Society 499, no. 1 (2020): 1499–505. http://dx.doi.org/10.1093/mnras/staa2964.

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ABSTRACT We consider the emission of resonance line radiation from rotating circular accretion disc with the progressive increasing height (the inclined ring). Our theory can also be applied to the rotating spot-like sources of resonance radiation. We assume that the atmosphere of inclined ring is homogeneous. In this case, the every part of ring emits the radiation with the wave electric field oscillations perpendicular to plane $(\boldsymbol{nN^{\prime }})$, where ${\boldsymbol{n}}$ is the direction to a telescope and $\boldsymbol{N^{\prime }}$ is the normal to considered local surface of a

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Vishnyakov, G. N., A. Fricke, N. M. Parkhomenko, and J. Przybylska. "Report on supplementary comparison COOMET.PR-S2: angle of rotation of plane of polarization." Metrologia 56, no. 1A (2019): 02002. http://dx.doi.org/10.1088/0026-1394/56/1a/02002.

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13

Каманина, Н. В., А. А. Каманин та С. В. Лихоманова. "Оптический эффект вращения плоскости поляризации света в ДНК-содержащих материалах". Письма в журнал технической физики 45, № 3 (2019): 10. http://dx.doi.org/10.21883/pjtf.2019.03.47263.17333.

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AbstractUsing the example of DNA water solutions, a manifestation of the light polarization plane rotation effect has been shown (in comparison with a number of dyes). Numerical values of the rotation angle have been established that significantly exceed those for water solutions of dyes and sugar traditionally used in saccharimeters and polarimeters. Therefore, another optical effect in biostructuring optical materials has been identified and confirmed.

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14

Chubukov, Dmitry V., Leonid V. Skripnikov, Vasily N. Kutuzov, Sergey D. Chekhovskoi, and Leonti N. Labzowsky. "Optical Rotation Approach to Search for the Electric Dipole Moment of the Electron." Atoms 7, no. 2 (2019): 56. http://dx.doi.org/10.3390/atoms7020056.

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The P , T -odd Faraday effect (i.e., rotation of the polarization plane of light propagating through a medium in presence of the external electric field due to P , T symmetry violating interactions) is considered for several atomic species: Ra, Pb, Tl, Hg, Cs, and Xe. Corresponding theoretical simulation of P , T -odd Faraday experiment, with already achieved intracavity absorption spectroscopy characteristics and parameters, is performed. The results show that the magnetic dipole transitions in the Tl and Pb atoms as well as the electric dipole transitions in the Ra, Hg and Cs atoms are favor

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15

di Serego Alighieri, Sperello. "Cosmic polarization rotation: An astrophysical test of fundamental physics." International Journal of Modern Physics D 24, no. 06 (2015): 1530016. http://dx.doi.org/10.1142/s0218271815300165.

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Possible violations of fundamental physical principles, e.g. the Einstein equivalence principle on which all metric theories of gravity are based, including general relativity (GR), would lead to a rotation of the plane of polarization for linearly polarized radiation traveling over cosmological distances, the so-called cosmic polarization rotation (CPR). We review here the astrophysical tests which have been carried out so far to check if CPR exists. These are using the radio and ultraviolet polarization of radio galaxies and the polarization of the cosmic microwave background (both E-mode an

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16

Silant’ev, Nikolai, Galina Alekseeva, Yulia Ananjevskaja, and Viktor Novikov. "Intensity and Polarization of Radiation Emerging from Rotating Accretion Disc with Increasing Height." Universe 6, no. 8 (2020): 117. http://dx.doi.org/10.3390/universe6080117.

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We consider the radiation emission in continuum and spectral lines from rotating accretion disc with the progressive increasing height. It is known that for the plane accretion disc with homogeneous atmosphere the wave electric field E is perpendicular to the plane between line of sight n and the normal to the disc N. For the expanding accretion disc the wave electric field from every inclined cone-like part with given azimuthal angle φ has direction perpendicular to the plane between n and local normal N′ to the inclined surface. This behaviour is the consequence of homogeneity of inclined at

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17

Vishnyakov, G. N., G. G. Levin, and A. G. Lomakin. "Measuring the angle of rotation of the plane of polarization by differential polarimetry with a rotating analyzer." Journal of Optical Technology 78, no. 2 (2011): 124. http://dx.doi.org/10.1364/jot.78.000124.

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18

JI, PEIYONG, HUA ZHOU, and H. Q. LU. "GRAVITATIONAL FARADAY EFFECT INDUCED BY HIGH-POWER LASERS." Modern Physics Letters A 20, no. 08 (2005): 597–603. http://dx.doi.org/10.1142/s0217732305016154.

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Gravitational field produced by high-power laser is calculated according to the linearized Einstein field equation in weak field approximation. Gravitational Faraday effect of electromagnetic wave propagating in the above gravitational field is studied and the rotation angle of polarization plane of electromagnetic wave is derived. The result is discussed and estimated in the condition of present experimental facility.

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19

C. Amala Prathiba Janet, P. Suresh, and T. V. S. Pillai. "Effect of Pupil Beam in the Focal Region of High Numerical Aperture Objective Lens." Journal of Environmental Nanotechnology 4, no. 1 (2015): 76–79. http://dx.doi.org/10.13074/jent.2015.03.144117.

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In this article, based on vector diffraction theory the focusing properties of double ring shaped higher order Laguerre - Gauss beam with radial varying polarization are investigated numerically. The numerical simulations show that the evolution of some interesting focal spot, focal split and focal patterns in the focal region by changing polarization rotation angle under tight focusing through the high NA lens. It is also shown that a subwavelength focal hole with a quite long depth of focus, multiple focal holes are achieved near the focus, when tuning Î² (is the ratio of the pupil radius to

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20

Loktev, Vladislav, Tuomo Salmi, Joonas Nättilä, and Juri Poutanen. "Oblate Schwarzschild approximation for polarized radiation from rapidly rotating neutron stars." Astronomy & Astrophysics 643 (November 2020): A84. http://dx.doi.org/10.1051/0004-6361/202039134.

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We have developed a complete theory for the calculation of the observed Stokes parameters for radiation emitted from the surface of a rapidly rotating neutron star (NS) using the oblate Schwarzschild approximation. We accounted for the rotation of the polarization plane due to relativistic effects along the path from the stellar surface to the observer. The results were shown to agree with those obtained by performing full numerical general relativistic ray-tracing with the ARCMANCER code. We showed that the obtained polarization angle profiles may differ substantially from those derived for a

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21

Outram, Benjamin I., and Steve J. Elston. "A Novel Method for Measuring the Difference in Flexoelectric Coefficients of Nematic Liquid Crystals." Solid State Phenomena 181-182 (November 2011): 26–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.181-182.26.

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The difference between e1 and e3 parameters for flexoelectric polarization, as originally defined byMeyer, is measured for nematic liquid crystal materials E7 and BL087 in Twisted Nematic (TN) cells with In-Plane Switching (IPS) electric fields using the crystal rotation method, which measures transmission as a function of angle of incidence. Values of e1 − e3 for E7 and BL087 are found to be 7.2±1.0 pCm−1 and 9.4±1.0 pCm−1 respectively.

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22

Nati, Federico, Mark J. Devlin, Martina Gerbino, et al. "POLOCALC: A Novel Method to Measure the Absolute Polarization Orientation of the Cosmic Microwave Background." Journal of Astronomical Instrumentation 06, no. 02 (2017): 1740008. http://dx.doi.org/10.1142/s2251171717400086.

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We describe a novel method to measure the absolute orientation of the polarization plane of the Cosmic Microwave Background (CMB) photons with arcsecond accuracy, enabling unprecedented measurements for cosmology and fundamental physics. Existing and planned CMB polarization instruments looking for primordial B-mode signals need an independent, experimental method for systematics control on the absolute polarization orientation. The lack of such a method limits the accuracy of the detection of inflationary gravitational waves, the constraining power on the neutrino sector through measurements

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23

Vereshchagin, Konstantin A., Alexey K. Vereshchagin, Vyacheslav B. Morozov, and Vladimir G. Tunkin. "Cascaded Stimulated Polariton Scattering in a Single-Pass KTP Crystal under Picosecond Pumping." Photonics 10, no. 12 (2023): 1355. http://dx.doi.org/10.3390/photonics10121355.

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Cascaded stimulated polariton scattering (SPS) under powerful picosecond pumping of 532 nm wavelength was investigated in a single pass of a KTP (KTiOPO4) crystal. Under ordinary polarization of the pump wave (relatively XOZ-plane) parametric scattering in the KTP crystal was observed. By rotation of the pump wave polarization (from ordinary to extraordinary), this scattering gradually transforms into polariton scattering. Polariton signal components (spots) with gaps between them were registered at external angles of ~2° between the neighboring spots. Five polariton signal components were det

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Suzuki, I., S. J. Timerick, and V. J. Wilson. "Body position with respect to the head or body position in space is coded by lumbar interneurons." Journal of Neurophysiology 54, no. 1 (1985): 123–33. http://dx.doi.org/10.1152/jn.1985.54.1.123.

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In decerebrate cats, we have studied the response of neurons in the L3-L6 segments of the spinal cord to stimulation of neck and vestibular receptors. Neck receptors were stimulated by head rotation in labyrinthectomized cats or by body rotation with the head fixed in labyrinth-intact cats. Vestibular receptors were stimulated by whole-body tilt in the latter preparation. Most neurons were located outside the motoneuron nuclei and were arbitrarily classified as interneurons. Combinations of roll and pitch stimuli at frequencies of 0.1 or 0.05 Hz were used to determine the horizontal component

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Lemarchand, N., J. Grain, G. Hurier, F. Lacasa, and A. Ferté. "Secondary CMB anisotropies from magnetized haloes." Astronomy & Astrophysics 630 (October 2019): A149. http://dx.doi.org/10.1051/0004-6361/201834485.

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Magnetized plasmas within haloes of galaxies leave their footprint on the polarized anisotropies of the cosmic microwave background. The two dominant effects of astrophysical haloes are Faraday rotation, which generates rotation of the plane of linear polarization, and Faraday conversion, which induces a leakage from linear polarization to circular polarization. We revisit these sources of secondary anisotropies by computing the angular power spectra of the Faraday rotation angle and the Faraday conversion rate by the large-scale structures. To this end, we use the halo model and we pay specia

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Karpun, Ye O., S. O. Borsuk, L. I. Kucherenko, and V. V. Parchenko. "The study of the optical activity of some S-derivatives 4-R-5-((((3-(pyridin-4-yl)-1H-1,2,4-triazole-5-yl)thio)methyl)-4H-1, 2,4-triazole-3-thiols." Current issues in pharmacy and medicine: science and practice 15, no. 2 (2022): 128–32. http://dx.doi.org/10.14739/2409-2932.2022.2.255791.

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About half of the drugs currently produced are chiral compounds, and about 90 % of these compounds are sold as racemates, consisting of an equimolar mixture of two enantiomers. Although they have the same chemical structure, most of the optical isomers of chiral substances show marked differences in biological activity. It is known that the presence of a single asymmetric atom has become almost an integral part of advanced drug design. The aim of this work was to determine the angle of rotation of the polarization plane of solutions of some S-derivatives of 4-R-5-((((3-(pyridin-4-yl)-1H-1,2,4-

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Sofue, Yoshiaki, and Rainer Beck. "The Bisymmetric Spiral Magnetic Field in M31." Publications of the Astronomical Society of Japan 39, no. 4 (1987): 541–46. https://doi.org/10.1093/pasj/39.4.541.

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Abstract The radio polarization data of M31 taken with the 100-m telescope at 2.7 GHz (λ 11 cm) are reanalyzed to investigate the magnetic field structure. Variation of polarization angle along an azimuthal circle in the galactic plane can be described as a superposition of a single- and a doubleperiodic variation. This variation is interpreted as due to a Faraday rotation caused by a bisymmetric open spiral (BSS) magnetic field superposed on the predominant ring field. The coexistence of the two modes (ring and BSS) of magnetic field configurations poses a new aspect on the origin and mainten

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Tanaka, Masaomi, Koji S. Kawabata, Takashi Hattori, et al. "Spectropolarimetry of Type Ibc Supernovae." Proceedings of the International Astronomical Union 7, S279 (2011): 138–41. http://dx.doi.org/10.1017/s1743921312012823.

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AbstractStudying a multi-dimensional structure of supernovae (SNe) gives important constraints on the mechanism of the SN explosion. Polarization measurement is one of the most powerful methods to study the explosion geometry of extragalactic SNe. Especially, Type Ib/c SNe are the ideal targets because the core of the explosion is bare. We have performed spectropolarimetric observations of Type Ib/c SNe with the Subaru telescope. We detect a rotation of the polarization angle across the line, which is seen as a loop in the Q - U plane. This indicates that axisymmetry is broken in the SN ejecta

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Borgese, Michele, Filippo Costa, Simone Genovesi, and Giuliano Manara. "Depolarizing Chipless Tags with Polarization Insensitive Capabilities." Electronics 10, no. 4 (2021): 478. http://dx.doi.org/10.3390/electronics10040478.

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A novel depolarizing chipless tag configuration with high angular insensitivity is presented. The basic tag comprises two dipole resonators arranged with a relative rotation of 45°. The proposed configuration improves the depolarization properties performance of a single dipole over the ground plane which provides a peak with perfect polarization conversion only if the electric field impinges at 45° with respect to the dipole resonator. The second dipole arranged at 45° compensates the cross-polar reduction which is observed when the electric field is not correctly polarized. Indeed, when the

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Trubin, A. A. "Rotations of Cylindrical Dielectric Resonators in a Rectangular Waveguide." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 86 (September 30, 2021): 22–28. https://doi.org/10.20535/radap.2021.86.22-28.

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The coupling coefficients of cylindrical dielectric resonators with a regular rectangular waveguide under the condition their axes rotation are calculated. The dependences of the coupling coefficients on the angles of rotation and transverse coordinates of the resonator in the case of excitation of the main magnetic types of natural oscillations in them are considered. The dependence of the coupling value on the angles of rotation at the points of circular polarization of the fundamental wave of a rectangular waveguide is shown. The condition for the angle of rotation of the axis of the resona

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Muhamad Nadzir, Norsaidah, Mohamad Kamal A. Rahim, Noor Asniza Murad, Mohamed Himdi, and Osman Ayop. "Circular Complementary Split Ring Resonator Rotation for Linear Array Millimeter Wave Microstrip Patch Antenna." ELEKTRIKA- Journal of Electrical Engineering 20, no. 3 (2021): 43–47. http://dx.doi.org/10.11113/elektrika.v20n3.343.

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This paper proposes multiple linear array millimeter wave MPAs that could operate at various frequencies depending on the angular rotation of the CSRR structure. The main contribution of this work is the range of frequencies of the linear array MPA found when the position of the CSRR structure is changed angularly. This is achieved by positioning the CSRR structure on the ground plane of the MPA and rotate it to an incremental of 22.5°. Computer Simulation Technology software is used to simulate the antenna designs. The performance of the antenna is evaluated against the single element millime

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Saito, T., T. Sutani, K. Kiyono, and T. Oikawa. "Polarization Characterization of LEDs by Stokes Parameters Measurements." Journal of Physics: Conference Series 2149, no. 1 (2022): 012009. http://dx.doi.org/10.1088/1742-6596/2149/1/012009.

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Abstract Stokes parameters have been measured by using a polarimeter consisting of a rotating phase plate before a fixed polarizer for bullet-shaped red, green and blue LEDs at 3 different directions of 0°, 45° and 90° from the principal axis. The degree of polarization is minimum at the observation angle 0° (observed head-on) for all colors as expected but has non-zero values (1-9%). As for the possible cause for the partial polarization, it is likely to be brought by striae inside the transparent epoxy resin that can be easily visible. Data at observation angle 90° have features common for a

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Bino, Gianfranco, Shantanu Basu, Masahiro N. Machida, et al. "Synthetic Polarization Maps of an Outflow Zone from Magnetohydrodynamic Simulations." Astrophysical Journal 936, no. 1 (2022): 29. http://dx.doi.org/10.3847/1538-4357/ac7c0f.

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Abstract The canonical theory of star formation in a magnetized environment predicts the formation of hourglass-shaped magnetic fields during the prestellar collapse phase. In protostellar cores, recent observations reveal complex and strongly distorted magnetic fields in the inner regions that are sculpted by rotation and outflows. We conduct resistive, nonideal magnetohydrodynamic simulations of a protostellar core and employ the radiative transfer code POLARIS to produce synthetic polarization segment maps. A comparison of our mock-polarization maps based on the toroidal-dominated magnetic

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Harasim, Damian. "The Influence of Fibre Bending on Polarization-Dependent Twist Sensor Based on Tilted Bragg Grating." Metrology and Measurement Systems 24, no. 3 (2017): 577–84. http://dx.doi.org/10.1515/mms-2017-0038.

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AbstractThis paper presents an experimental study on influence of input light polarization on the spectral characteristics of a fibre twist sensor based onTilted Fiber Bragg Grating(TFBG) with simultaneous application of bending to an optical fibre. The application of proposed measurement stand could provide the ability of transforming the bending to a displacement. The twist measurement was performed by tuning of the sensor illuminating light polarization angle. The spectral parameters of selected cladding mode which are sensitive to the rotation of input light polarization angle have been sh

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Loktev, Vladislav, Alexandra Veledina, and Juri Poutanen. "Analytical techniques for polarimetric imaging of accretion flows in the Schwarzschild metric." Astronomy & Astrophysics 660 (April 2022): A25. http://dx.doi.org/10.1051/0004-6361/202142360.

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Emission from an accretion disk around compact objects, such as neutron stars and black holes, is expected to be significantly polarized. The polarization can be used to put constraints on the geometrical and physical parameters of the compact sources – their radii, masses, and spins – as well as to determine the orbital parameters. The radiation escaping from the innermost parts of the disk is strongly affected by the gravitational field of the compact object and the relativistic velocities of the matter. The straightforward calculation of the observed polarization signatures involves a compu

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Zhang, Chi, Yonghua Lu, Jing Li, and Rui Wang. "Research on beam bunching and deflection characteristics of low-power laser under the electromagnetic effect." Measurement and Control 52, no. 5-6 (2019): 379–86. http://dx.doi.org/10.1177/0020294019838575.

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The bunching and deflection characteristics of low-power laser beam were investigated under electromagnetic field. On the basis of the Faraday effect, the cylindrical electromagnetic cavity was designed and implemented in the experiments. Several types of the magneto-optical elements were placed in the electromagnetic cavity individually. In the test of the deflection characteristics of low-power laser, the rotating angle, the polarization plane of linearly polarized light which passed through electromagnetic cavity, was measured by polarization extinction. We focus on the relation between the

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Greco, Alessandro, Nicola Bartolo, and Alessandro Gruppuso. "Cosmic birefrigence: cross-spectra and cross-bispectra with CMB anisotropies." Journal of Cosmology and Astroparticle Physics 2022, no. 03 (2022): 050. http://dx.doi.org/10.1088/1475-7516/2022/03/050.

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Abstract Parity-violating extensions of Maxwell electromagnetism induce a rotation of the linear polarization plane of photons during propagation. This effect, known as cosmic birefringence, impacts on the Cosmic Microwave Background (CMB) observations producing a mixing of E and B polarization modes which is otherwise null in the standard scenario. Such an effect is naturally parametrized by a rotation angle which can be written as the sum of an isotropic component α 0 and an anisotropic one δα(n̂). In this paper we compute angular power spectra and bispectra involving δα and the CMB temperat

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Мухортов, В. М., Д. В. Стрюков, С. В. Бирюков та Ю. И. Головко. "Переключение поляризации вдоль подложки в тонких пленках Bi-=SUB=-4-=/SUB=-Ti-=SUB=-3-=/SUB=-O-=SUB=-12-=/SUB=- при различных деформационных напряжениях". Журнал технической физики 90, № 1 (2020): 128. http://dx.doi.org/10.21883/jtf.2020.01.48673.205-19a.

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A study of epitaxial Bi4Ti3O12 thin films with a pre-deposited 4 nm Ba0.4Sr0.6TiO3 sublay-er on (001) MgO substrates has been performed. In the obtained heterostructures, the rotation of the Bi4Ti3O12 film unit cells by an angle of 45° relative to the MgO substrate unit cell in the inter-face plane has been observed. The Bi4Ti3O12 films contain unit cell deformations depending on the thickness of the film and the sign of the deformation changes at a thickness of ~40 nm. The switchable in-plane spontaneous polarization of Bi4Ti3O12 film at the 180° domain structure oc-curs at a film thickness o

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Sarsour, M., J. Amadio, E. Anderson, et al. "Neutron spin rotation measurements." EPJ Web of Conferences 219 (2019): 06002. http://dx.doi.org/10.1051/epjconf/201921906002.

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The neutron spin rotation (NSR) collaboration used parity-violating spin rotation of transversely polarized neutrons transmitted through a 0.5 m liquid helium target to constrain weak coupling constants between nucleons. While consistent with theoretical expectation, the upper limit set by this measurement on the rotation angle is limited by statistical uncertainties. The NSR collaboration is preparing a new measurement to improve this statistically-limited result by about an order of magnitude. In addition to using the new high-flux NG-C beam at the NIST Center for Neutron Research, the appar

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Rumyantsev, V. V., S. A. Fedorov, K. V. Gumennyk, and A. Ye Rybalka. "GYROTROPY FEATURES OF AN IMPERFECT OPTICALLY ACTIVE 1D PHOTONIC ORIENTATIONALLY DISORDERED CRYSTAL." Journal of Applied Spectroscopy 89, no. 3 (2022): 354–59. http://dx.doi.org/10.47612/0514-7506-2022-89-3-354-359.

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The paper is devoted to gyrotropic characteristics of a non-ideal 1D photonic crystal with an arbitrary number of sublattices (of which one is the optically active potassium dithionate K2S2O6) and to their variation due to a random layer substitution in the K2S2O6 sublattice by modeling impurity layers of an orientationally disordered molecular crystal. We adopt a microscopic approach to study the specific (per unit volume) light polarization plane rotation angle in the exciton spectrum region and perform the numerical calculation of the superlattice optical activity dependence on concentratio

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Ehara, Yoshitaka, Takaaki Nakashima, Daichi Ichinose, et al. "Film thickness dependence of in-plane ferroelastic domain structure in constrained tetragonal PbTiO₃ films induced by isotropic tensile strain." Applied Physics Letters 121, no. 26 (2022): 262901. http://dx.doi.org/10.1063/5.0119843.

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In this study, the ferroelectric phase of PbTiO3 (PTO) thin films was grown on cubic single-crystal KTaO3 (KTO) substrates using metal–organic chemical vapor deposition. X-ray diffraction (XRD) was used to reveal an a1 /a2 domain structure, which remained unchanged down to a film thickness of 2 nm. The a1 and a2 polydomains do not have a simple tetragonal symmetry because aa∥ and aa⊥ do not have the same values. The crystallographic tilt angle, α, is defined based on the rotation angle of the PTO lattice with respect to the cubic phase of KTO substrates. The in-plane tetragonal distortion ( ca

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Ritacco, A., N. Ponthieu, A. Catalano, et al. "Polarimetry at millimeter wavelengths with the NIKA camera: calibration and performance." Astronomy & Astrophysics 599 (February 23, 2017): A34. http://dx.doi.org/10.1051/0004-6361/201629666.

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Magnetic fields, which play a major role in a large number of astrophysical processes can be traced via observations of dust polarization. In particular, Planck low-resolution observations of dust polarization have demonstrated that Galactic filamentary structures, where star formation takes place, are associated to well organized magnetic fields. A better understanding of this process requires detailed observations of galactic dust polarization on scales of 0.01 to 0.1 pc. Such high-resolution polarization observations can be carried out at the IRAM 30 m telescope using the recently installed

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Ordog, Anna, Jo-Anne C. Brown, T. L. Landecker, et al. "A Pioneering Experiment Combining Single-antenna and Aperture-synthesis Data to Measure Faraday Rotation with GMIMS and the CGPS." Astronomical Journal 169, no. 6 (2025): 312. https://doi.org/10.3847/1538-3881/adc929.

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Abstract Structures in the magnetoionic medium exist across a wide range of angular sizes owing to large-scale magnetic fields coherent over the Galactic spiral arms combined with small-scale fluctuations in the magnetic field and electron density resulting from energy injection processes such as supernovae. For the first time, we produce diffuse Galactic synchrotron emission Faraday rotation maps covering all spatial scales down to 3 ′ resolution for magnetic field studies. These maps complement total and polarized intensity maps combining single-antenna and interferometric data that have bee

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Ступак, М. Ф., Н. Н. Михайлов, С. А. Дворецкий та ін. "Возможности характеризации кристаллических параметров структур Cd-=SUB=-x-=/SUB=-Hg-=SUB=-1-x-=/SUB=-Te на подложке из GaAs методом генерации на отражение второй гармоники зондирующего излучения". Физика твердого тела 62, № 2 (2020): 214. http://dx.doi.org/10.21883/ftt.2020.02.48870.601.

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Abstract Comparative results of computational simulation and experiment are provided, concerning the azimuthal angle dependency of the registered signal second harmonic reflected from CdxHg1–xTe structures and GaAs substrates at the normal incidence of probing laser radiation and azimuthal rotation of its polarization plane. The study of (013) GaAs substrate and buffer layers of CdTe|ZnTe|GaAs has revealed that the deviations from the (013) surface orientation with regard to crystal physics angles ϴ and φ are ~1–3° for GaAs substrates and up to 8° for buffer layers of CdTe|ZnTe|GaAs, while the

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Le Gouellec, Valentin J. M., B.-G. Andersson, Archana Soam, et al. "The Origin of Dust Polarization in the Orion Bar." Astrophysical Journal 951, no. 2 (2023): 97. http://dx.doi.org/10.3847/1538-4357/accff7.

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Abstract The linear polarization of thermal dust emission provides a powerful tool to probe interstellar and circumstellar magnetic fields, because aspherical grains tend to align themselves with magnetic field lines. While the Radiative Alignment Torque (RAT) mechanism provides a theoretical framework for this phenomenon, some aspects of this alignment mechanism still need to be quantitatively tested. One such aspect is the possibility that the reference alignment direction changes from the magnetic field (“B-RAT”) to the radiation field k-vector (“k-RAT”) in areas of strong radiation fields.

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Myserlis, I., S. Komossa, E. Angelakis, et al. "High cadence, linear, and circular polarization monitoring of OJ 287." Astronomy & Astrophysics 619 (November 2018): A88. http://dx.doi.org/10.1051/0004-6361/201732273.

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Aims. We present a multifrequency, dense radio monitoring program of the blazar OJ 287 using the 100-m Effelsberg radio telescope. The program aims to test different binary supermassive black hole (SMBH) scenarios and studying the physical conditions in the central region of this bright blazar. Here, we analyze the evolution in total flux density, linear and circular polarization as a means to study the OJ 287 jet structure and its magnetic field geometry. Methods. We used a recently developed, high-precision data analysis methodology to recover all four Stokes parameters. We measured the tota

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Golovina, T. G., A. F. Konstantinova, V. M. Kasimova, E. V. Zabelina, N. S. Kozlova, and G. Yu Deev. "Annealing effect of Ca3TaGa3Si2O14 catangasite crystals on their optical activity." Kristallografiâ 69, no. 5 (2024): 834–42. http://dx.doi.org/10.31857/s0023476124050092.

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The spectral dependences of transmission and absorption in the wavelength range of 200–2500 nm were measured for Ca3TaGa3Si2O14 crystals cut perpendicular to the optical axis in the initial state (without annealing) and after isothermal annealing in vacuum and in air. It was found that annealing in vacuum leads to a decrease, and annealing in air leads to an increase in the intensity of absorption bands. A spectrophotometric method for measuring and calculating the specific rotation angle ρ of the plane of polarization of light in gyrotropic crystals from the transmission coefficient spectra a

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Iwasawa, H., K. Shimada, E. F. Schwier, et al. "Rotatable high-resolution ARPES system for tunable linear-polarization geometry." Journal of Synchrotron Radiation 24, no. 4 (2017): 836–41. http://dx.doi.org/10.1107/s1600577517008037.

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A rotatable high-resolution angle-resolved photoemission spectroscopy (ARPES) system has been developed to utilize tunable linear-polarization geometries on the linear undulator beamline (BL-1) at Hiroshima Synchrotron Radiation Center. By rotating the whole ARPES measurement system, the photoelectron detection plane can be continuously changed from parallel to normal against the electric field vector of linearly polarized undulator radiation. This polarization tunability enables us to identify the symmetry of the initial electronic states with respect to the mirror planes, and to selectively

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Kirilenko, A., S. Steshenko, Y. Ostryzhnyi, and V. Derkach. "EIGEN-OSCILLATIONS OF PLANAR-CHIRAL BILAYER OBJECTS GIVE RISE TO ARTIFICIAL OPTICAL ACTIVITY." Radio physics and radio astronomy 29, no. 1 (2024): 015–25. http://dx.doi.org/10.15407/rpra29.01.015.

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Subject and Purpose. The research focuses on how the resonance frequencies, the Q-factor of resonances, and the polarization plane rotation ability are influenced by the topology of individual components of a planar-chiral double-layer object consisting of a pair of con- jugated irises having rectangular slots and accommodated in a circular waveguide. Methods and Methodology. All the numerical results are obtained by the mode-matching technique (MMT) and the transverse reso- nance method on the basis of our own proprietary MWD-03 software package. Results. By the waveguide example, it has been

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Kadam, Mansi. "Light Intensity Control Using Polaroids." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (2022): 585–89. http://dx.doi.org/10.22214/ijraset.2022.38293.

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Abstract: In today’s era of illuminating devices, there are a wide variety of devices available in aesthetics but the none with variable intensity of light. Using the basic principle of polarization of light using a Polaroid filter or polarizer, the designing of a light intensity control was done. The polarizing angle of the filter decides the intensity of the light that would pass through the filters. According to the principle of propagation of light, the electric and magnetic vibrations of a light wave occur perpendicularly to each other. A light wave that is vibrating in more than one plan

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