To see the other types of publications on this topic, follow the link: Brewster angle.

Journal articles on the topic 'Brewster angle'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Brewster angle.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Enayat, Wahidullah. "Measuring the refractive index of the slab and the thin layer by measuring the Brewster angle." Pazhohesh Scientific Journal 16 (March 6, 2019): 243–48. https://doi.org/10.5281/zenodo.5234653.

Full text
Abstract:
In the polarization of light, determining the refractive index of an infrared environment, optical contacts, calibration of optical measuring devices, and many other things, the Brewster angle plays an important role. If the polarized light with the Brewster angle bends to the surface, no reflections from the surface occur, so sometimes the Brewster angle is also known as the angle of polarization. In this experiment, we want to determine the refractive index of the glass slab by examining the reflection of the light from the surface at different angles or the so-called Brewster angle measurement method. Keywords: polarization of light, calibration, Brewster angle, polarized light, reflection, refractive index.
APA, Harvard, Vancouver, ISO, and other styles
2

Lakhtakia, Akhlesh. "Would Brewster recognize today's Brewster angle?" Optics News 15, no. 6 (1989): 14. http://dx.doi.org/10.1364/on.15.6.000014.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Futterman, J. "Magnetic Brewster angle." American Journal of Physics 63, no. 5 (1995): 471. http://dx.doi.org/10.1119/1.17915.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kaercher, Thomas, Dirk H�nig, and Dietmar M�bius. "Brewster angle microscopy." International Ophthalmology 17, no. 6 (1994): 341–48. http://dx.doi.org/10.1007/bf00915741.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kaercher, T. "Brewster angle microscopy." Vision Research 35, no. 1 (1995): S97. http://dx.doi.org/10.1016/0042-6989(95)98382-j.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Sihvola, Ari. "An Elementary Approach in Teaching Brewster's Angle." International Journal of Electrical Engineering & Education 32, no. 1 (1995): 39–42. http://dx.doi.org/10.1177/002072099503200105.

Full text
Abstract:
An elementary approach in teaching Brewster angle Brewster angle is an important concept in learning optics and electromagnetic wave propagation phenomena. It conveys the emphasis on polarisation of the fields. An intuitive way is presented to derive Brewster angle by connecting impedances and reflection coefficients. The radical polarisation differences emerge clearly from this approach.
APA, Harvard, Vancouver, ISO, and other styles
7

Kaercher, T., D. Möbius, R. Welt, and D. Hönig. "2231 Brewster angle microscopy." Vision Research 35 (October 1995): S97. http://dx.doi.org/10.1016/0042-6989(95)90173-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Syukron, Ahmad Aftah, and Isnaini Lilis Elviyanti. "Study of a silica glass SiO2-Na2O refractive index to fabrication of fiber optic with Brewster method." Journal of Physics: Theories and Applications 3, no. 2 (2019): 77. http://dx.doi.org/10.20961/jphystheor-appl.v3i2.39709.

Full text
Abstract:
<p align="justify">One of the critical parameters in the fabrication of fiber optic is refractive index value from the fiber optic material. That is because the main requirement phase of critical angle on the fiber optic waveguide is a core refractive index higher than the cladding. Therefore, refractive index values must be calculated first. The research aim is to study refractive index value of fiber optic material on the fiber optic fabrication. Refractive index value determined by using the brewster method. For this aim, the first step is an establish glass silica to a thin plate. Then thin plate inserts to the sketch of brewster experiment. The brewster method has the aim to determine the reflectance value of the light on transfer magnetic (TM) polarization. The Brewster angle determined by searching the minimum reflectance value of the light on this TM polarization. In this research, the brewster angle obtained by 55.333 degrees. This brewster angle used to calculate the refractive index value from the fiber optic material glass silica. The result of refractive index value at 1.446.</p>
APA, Harvard, Vancouver, ISO, and other styles
9

Cartier, R. H. "Critical angle vs. deviation angle vs. Brewster angle." Journal of Gemmology 27, no. 4 (2000): 233–36. http://dx.doi.org/10.15506/jog.2000.27.4.233.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Krylov, V. P., and A. E. Zhitelev. "Determination of the Brewster angle of the wave reflected from a plate with dielectric losses." Industrial laboratory. Diagnostics of materials 87, no. 11 (2021): 39–42. http://dx.doi.org/10.26896/1028-6861-2021-87-11-39-42.

Full text
Abstract:
In free space, the permittivity of materials is usually determined by the value of the Brewster angle using the angular dependences of the amplitude and phase of the wave reflected from the material plate. An expression corresponding to materials without dielectric and magnetic losses is used as a calculation model. Experimental studies of the parameters of the wave reflected from dielectric materials show the discrepancies with theoretical calculations known as deviations from the Fresnel laws. We present the results of determining the Brewster angle of the wave reflected from a plate made of a material with dielectric losses. The angular dependences of the amplitude and phase of the reflected wave were calculated using the numerical solution of the problem of falling at an arbitrary angle of a plane linearly polarized wave with an electric field vector lying in the plane of incidence on a plate of a dielectric material with complex values of the dielectric and magnetic permittivity. They were used to determine the angles corresponding to the minimum reflection coefficient depending on the dielectric losses of the plate material. The differences between the numerical calculations and the data obtained using the Brewster angle formula were noted, which increased with increasing dielectric losses of the material. From the condition that the modulus of the reflected wave amplitude is equal to zero, a different formula for calculating the Brewster angle for a material with losses is analytically obtained. The results of calculations using this formula coincided with the calculations for the reflected wave when solving the classical problem of the inclined incidence of a plane wave on a plate of a dielectric material in the framework of geometric optics. The results obtained can be used to determine the Brewster angle for a wave reflected from a plate with magnetic and dielectric losses.
APA, Harvard, Vancouver, ISO, and other styles
11

Dürr, T., R. Hildebrandt, G. Marowsky, and R. Stolle. "Nonlinear Brewster angle in transmission." Physical Review A 56, no. 5 (1997): 4139–41. http://dx.doi.org/10.1103/physreva.56.4139.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Meunier, J. "Why a Brewster angle microscope?" Colloids and Surfaces A: Physicochemical and Engineering Aspects 171, no. 1-3 (2000): 33–40. http://dx.doi.org/10.1016/s0927-7757(99)00555-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Cervantes, M. "Brewster angle prisms: a review." Optics & Laser Technology 20, no. 6 (1988): 297–300. http://dx.doi.org/10.1016/0030-3992(88)90058-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Thirion-Lefevre, Laetitia, and Régis Guinvarc'h. "The double Brewster angle effect." Comptes Rendus Physique 19, no. 1-2 (2018): 43–53. http://dx.doi.org/10.1016/j.crhy.2018.02.003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Lheveder, C., S. Hénon, R. Mercier, G. Tissot, P. Fournet, and J. Meunier. "A new Brewster angle microscope." Review of Scientific Instruments 69, no. 3 (1998): 1446–50. http://dx.doi.org/10.1063/1.1148779.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Hönig, Dirk, and Dietmar Möbius. "Reflectometry at the Brewster angle and Brewster angle microscopy at the air-water interface." Thin Solid Films 210-211 (April 1992): 64–68. http://dx.doi.org/10.1016/0040-6090(92)90169-c.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Linets, Gennadiy Ivanovich, Anatoliy Vyacheslavovich Bazhenov, Sergey Vladimirovich Malygin, Natalia Vladimirovna Grivennaya, Sergey Vladimirovich Melnikov, and Vladislav Dmitrievich Goncharov. "Evaluation of the Accuracy of the Remote Determination of the Brewster Angle When Measuring Physicochemical Parameters of Soil." AgriEngineering 5, no. 4 (2023): 1893–908. http://dx.doi.org/10.3390/agriengineering5040116.

Full text
Abstract:
In precision farming technology, the moisture of the soil, its granulometric composition, specific conductivity and a number of other physical and chemical parameters are determined using remote radar sensing. The most important parameters are those measured in the area of the plant root system located well below the “air-surface” boundary. In order to create conditions for the penetration of electromagnetic waves through the “air-surface” interface with a minimum reflection coefficient, the irradiation of the Earth’s surface is carried out obliquely with an angle of incidence close to the Brewster angle. The reflection coefficient, and, consequently, the Brewster angle, depend on the complex dielectric permittivity of the surface soil layer and are not known a priori. To determine the Brewster angle, the usual method is to search for the minimum amplitude of the vertically polarized signal reflected from the surface. Another approach is when the first derivative of the dependence of the modulus of the complex amplitude of a vertically polarized interference wave, taken with respect to the angle of incidence, is set equal to zero. In turn, in real dielectrics such as agricultural soils, the amplitude of the vertically polarized signal reflected from the surface is directly proportional to the reflection coefficient and does not have a pronounced minimum, which reduces the accuracy of the measurements. Based on the solution of the Helmholtz wave equation for a three-layered structure of the propagation medium (air, upper fertile soil layer, soil layer below the groundwater level), a model of the process of forming an interference wave under oblique irradiation of a planar layered dielectric with losses has been developed. Using the developed model, factors influencing the accuracy of determining the Brewster angle have been identified. For the first time, it is proposed to use the phase shift between the oscillations of the interference waves with vertical and horizontal polarization to measure the Brewster angle. A comparative assessment of the accuracy of determining the Brewster angle using known amplitude methods and the proposed phase method has been carried out. The adequacy of the method was experimentally confirmed. Recommendations have been developed for the practical application of the phase method of finding the Brewster angle for assessing the dielectric permittivity of soil and its moisture content.
APA, Harvard, Vancouver, ISO, and other styles
18

Froehle, Peter H. "The Critical Angle Can Override the Brewster Angle." Physics Teacher 47, no. 1 (2009): 34–35. http://dx.doi.org/10.1119/1.3049877.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Akimoto, Makio, and Yasuo Gekka. "Brewster and Pseudo-Brewster Angle Technique for Determination of Optical Constants." Japanese Journal of Applied Physics 31, Part 1, No. 1 (1992): 120–22. http://dx.doi.org/10.1143/jjap.31.120.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Heading, J. "Generalized Investigations into the Brewster Angle." Optica Acta: International Journal of Optics 33, no. 6 (1986): 755–70. http://dx.doi.org/10.1080/713822002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Castillo, R., S. Ramos, and J. Ruiz-Garcia. "Brewster angle microscopy of fullerene monolayers." Physica A: Statistical Mechanics and its Applications 236, no. 1-2 (1997): 105–13. http://dx.doi.org/10.1016/s0378-4371(97)86496-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Kálmán, P., L. Túri, and A. Tóth. "Brewster-angle cut doubled light shutter." Optics & Laser Technology 19, no. 6 (1987): 319–21. http://dx.doi.org/10.1016/0030-3992(87)90041-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Fernsler, Jonathan, Vincent Nguyen, Alison Wallum, et al. "A LEGO Mindstorms Brewster angle microscope." American Journal of Physics 85, no. 9 (2017): 655–62. http://dx.doi.org/10.1119/1.4991387.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Sotiropoulos, D. A. "Brewster angle for fluid–solid interfaces." Journal of Sound and Vibration 185, no. 3 (1995): 501–6. http://dx.doi.org/10.1006/jsvi.1995.0395.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Lazarus, M. J. "Brewster angle windows for large radomes." Microwave and Optical Technology Letters 17, no. 3 (1998): 181–84. http://dx.doi.org/10.1002/(sici)1098-2760(19980220)17:3<181::aid-mop9>3.0.co;2-f.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Kilcullen, Patrick, Mark Shegelski, MengXing Na, David Purschke, Frank Hegmann, and Matthew Reid. "Terahertz Spectroscopy and Brewster Angle Reflection Imaging of Acoustic Tiles." Journal of Spectroscopy 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/2134868.

Full text
Abstract:
A Brewster angle reflection imaging apparatus is demonstrated which is capable of detecting hidden water-filled voids in a rubber tile sample. This imaging application simulates a real-world hull inspection problem for Royal Canadian Navy Victoria-class submarines. The tile samples represent a challenging imaging application due to their large refractive index and absorption coefficient. With a rubber transmission window at approximately 80 GHz, terahertz (THz) sensing methods have shown promise for probing these structures in the laboratory. Operating at Brewster’s angle allows for the typically strong front surface reflection to be minimized while also conveniently making the method insensitive to air-filled voids. Using a broadband THz time-domain waveform imaging system (THz-TDS), we demonstrate satisfactory imaging and detection of water-filled voids without complicated signal processing. Optical properties of the tile samples at low THz frequencies are also reported.
APA, Harvard, Vancouver, ISO, and other styles
27

Lekner, John. "Reflection by uniaxial crystals: polarizing angle and Brewster angle." Journal of the Optical Society of America A 16, no. 11 (1999): 2763. http://dx.doi.org/10.1364/josaa.16.002763.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Sánchez-Alvarez, Araceli, Osvaldo Rodríguez-Quiroz, Gabriela Elizabeth Quintanilla-Villanueva, et al. "Development of a Portable Optomechatronic System to Obtain the Characterization of Transparent Materials and Dielectric Thin Films." Optics 5, no. 4 (2024): 595–610. https://doi.org/10.3390/opt5040044.

Full text
Abstract:
This paper outlines the design and fabrication of a portable optomechatronic system based on the theta-2theta configuration, which explores various optical characterization techniques for transparent materials and dielectric thin films. These techniques include Brewster angle and Abelès-Brewster angle measurements, critical angle measurements, and the surface plasmon resonance technique. The system consists of a mechanical assembly of rotating stages, a semiconductor laser, a photodiode connected to a data acquisition card, and a user interface for controlling the stepper motor rotation stages. Utilizing a BK7 substrate, the motorized stage achieved a resolution of 0.010. The Brewster angle measured was 56.550, with a refractive index (n) of 1.5137. The relative error obtained was Δn/n = 3.82 × 10−4, with a sensitivity of 164.27 RIU/degree and an accuracy of 0.37/degree. Furthermore, the discrepancies between theoretical and experimental refractive indices for different prisms at 639 nm ranged from ±7 × 10−4 to ±73 × 10−4. After testing various samples, the system demonstrated its capability to perform fast, precise, and non-invasive measurements. Its portability allows for use in diverse environments and applications.
APA, Harvard, Vancouver, ISO, and other styles
29

Wong, James S., and Yu-Sze Yen. "Intriguing Absorption Band Behavior of IR Reflectance Spectra of Silicon Dioxide on Silicon." Applied Spectroscopy 42, no. 4 (1988): 598–604. http://dx.doi.org/10.1366/0003702884429175.

Full text
Abstract:
Infrared reflectance spectra of a thermally grown 30-nm SiO2 film on a Si wafer were measured as a function of incident angle and polarization. Spectra measured with s-polarized light resemble the published extinction coefficient for SiO2. The p-polarized spectra show significant distortions at all incident angles. Bands change in frequency and intensity and can even invert as the incident angle increases beyond the Brewster angle of the Si substrate. Spectral simulations using the classical electromagnetic equations reproduce these distortions.
APA, Harvard, Vancouver, ISO, and other styles
30

KOO, J. S., K. SHIN, U. JENG, et al. "LIPOPHILIC-FULLERENE DERIVATIVE MONOLAYERS AT THE AIR–WATER INTERFACE." International Journal of Nanoscience 01, no. 05n06 (2002): 403–7. http://dx.doi.org/10.1142/s0219581x02000401.

Full text
Abstract:
Monolayers of a lipophilic C 60-derivative (FPTL) mixed in dipalmitoyl-phosphatidyl-choline (DPPC) have been studied by the Langmuir film balance technique and Brewster angle microscopy. Previous X-ray scattering studies showed that the FPTL molecules intercalated into the DPPC monolayers and modified the bending and compression modulus of the host DPPC membranes. Combined study of surface pressure–area isotherms and Brewster angle microscopy measurements clearly established that the liquid-condensed domain structures are strongly influenced by an addition of the fullerene bearing lipid molecules, where it caused smaller liquid-condensed domain structures.
APA, Harvard, Vancouver, ISO, and other styles
31

Sildoja, Meelis, Farshid Manoocheri, and Erkki Ikonen. "Reducing photodiode reflectance by Brewster-angle operation." Metrologia 45, no. 1 (2007): 11–15. http://dx.doi.org/10.1088/0026-1394/45/1/002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Majérus, Bruno, Mirko Cormann, Nicolas Reckinger, et al. "Modified Brewster angle on conducting 2D materials." 2D Materials 5, no. 2 (2018): 025007. http://dx.doi.org/10.1088/2053-1583/aaa574.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Norman, G. E., and I. M. Saitov. "Brewster angle of shock-compressed xenon plasmas." Journal of Physics: Conference Series 653 (November 11, 2015): 012111. http://dx.doi.org/10.1088/1742-6596/653/1/012111.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Surdutovich, Gregory, Ritta Vitlina, and Vitor Baranauskas. "Anisotropic protective coating for Brewster angle Windows." Applied Optics 38, no. 19 (1999): 4172. http://dx.doi.org/10.1364/ao.38.004172.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Kim, S. Y., and K. Vedam. "Analytic solution of the pseudo-Brewster angle." Journal of the Optical Society of America A 3, no. 11 (1986): 1772. http://dx.doi.org/10.1364/josaa.3.001772.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Read, Peter. "Further development of the Brewster-angle refractometer." Journal of Gemmology 21, no. 1 (1988): 36–39. http://dx.doi.org/10.15506/jog.1988.21.1.36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Gorelik, Sergey, Song Hongyan, Martin J. Lear, and Jonathan Hobley. "Transient Brewster angle reflectometry of spiropyran monolayers." Photochem. Photobiol. Sci. 9, no. 2 (2010): 141–51. http://dx.doi.org/10.1039/b9pp00105k.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Fu, Ceji, Zhuomin M. Zhang, and Phillip N. First. "Brewster angle with a negative-index material." Applied Optics 44, no. 18 (2005): 3716. http://dx.doi.org/10.1364/ao.44.003716.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Li, Irene Ling, Ling Fu, Hao Li, Jian Pang Zhai, and Shuang Chen Ruan. "Refraction Indices Measurement of Hexagonal Zeolite Crystal Using Brewster Angle Method." Advanced Materials Research 146-147 (October 2010): 429–32. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.429.

Full text
Abstract:
A simple method for measuring the refraction indices of small hexagonal crystals is studied. The method is based on Brewster angle law. The refractive indices are confirmed by measuring the Brewster angle on two different surfaces. As an example, the measured refractive indices for hexagonal zeolite crystals are ne=1.488 and no=1.327, respectively, which are necessary for further investigations on the nonlinear properties of these zeolite crystal, such as second harmonic generation (SHG) effect. This method avoids the damage of the sample, and is simple and quick, which is suitable for the measurements of small birefringent crystals.
APA, Harvard, Vancouver, ISO, and other styles
40

Zabelina, E. V., N. S. Kozlova, and V. M. Kasimova. "Multi-angle spectrophotometric reflectance methods for determining refractive indices." Kristallografiâ 69, no. 5 (2024): 843–50. http://dx.doi.org/10.31857/s0023476124050109.

Full text
Abstract:
The experience of developing and applying methods for measuring the refractive coefficients of crystals of the highest and middle categories based on multi-angle spectrophotometric reflection methods is presented: by the reflection spectrum from one face at an angle of incidence of light close to normal, and by the reflection method when light falls at Brewster angle. The advantages and limitations of the methods and the requirements for the samples are described. It is shown that the reflection method at an angle of incidence close to normal is applicable for optically isotropic media. The Brewster angle method is applicable for crystals of the highest and middle categories. The measurement accuracy of both methods has been determined. The applicability of these methods is shown for samples of crystals of the highest and middle categories Gd3Al2Ga3O12:Ce and La3Ga5.5Ta0.5O14 respectively.
APA, Harvard, Vancouver, ISO, and other styles
41

Lewerenz, H. J., and N. Dietz. "Defect identification in semiconductors by Brewster angle spectroscopy." Journal of Applied Physics 73, no. 10 (1993): 4975–87. http://dx.doi.org/10.1063/1.353817.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Lehmann, Kevin K., Paul S. Johnston, and Paul Rabinowitz. "Brewster angle prism retroreflectors for cavity enhanced spectroscopy." Applied Optics 48, no. 16 (2009): 2966. http://dx.doi.org/10.1364/ao.48.002966.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Surdutovich, G. I., R. Z. Vitlina, and V. Baranauskas. "Unique Brewster-angle window transparent to both polarizations." Thin Solid Films 355-356 (November 1999): 60–63. http://dx.doi.org/10.1016/s0040-6090(99)00443-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Liu, Ken, Wei-Min Ye, Xiao-Dong Yuan, Jia-Rong Ji, and Chun Zen. "Brewster angle of two-dimensional photonic crystal films." Optics Communications 238, no. 1-3 (2004): 119–22. http://dx.doi.org/10.1016/j.optcom.2004.04.036.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Sassen, Kenneth. "Polarization and Brewster angle properties of light pillars." Journal of the Optical Society of America A 4, no. 3 (1987): 570. http://dx.doi.org/10.1364/josaa.4.000570.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Harding, R. R., P. G. Read, and N. W. Deeka. "A new Brewster-angle meter for gem identification." Journal of Gemmology 26, no. 1 (2000): 539–42. http://dx.doi.org/10.15506/jog.1999.26.8.539.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Jungk, By G. "Remarks on the Brewster angle and some applications." Philosophical Magazine B 70, no. 3 (1994): 493–98. http://dx.doi.org/10.1080/01418639408240223.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Bhanthumnavin, V., and N. Ampole. "Theoretical prediction of nonlinear brewster angle in ADP." Microwave and Optical Technology Letters 3, no. 7 (1990): 239–41. http://dx.doi.org/10.1002/mop.4650030705.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Sun, Aoran, and Jianping Wang. "Limits in enhancement factor in near-brewster angle reflection pump-probe two-dimensional infrared spectroscopy." Chinese Journal of Chemical Physics 35, no. 1 (2022): 129–42. http://dx.doi.org/10.1063/1674-0068/cjcp2111234.

Full text
Abstract:
In this work, we simulated 2D infrared spectroscopy (IR) spectroscopy in both transmission geometry and Brewster-angle reflection geometry. Light dispersion and the leakage of s-polarized light are considered in simulating the enhancement factor of the reflection mode. Our simulation shows that the dispersion in reflection will only alter the 2D IR lineshape slightly and can be corrected. Leaking spolarized light due to imperfectness of IR polarizers in the reflection geometry may limit the enhancement factor, but such limit is above what a typical experiment can reach. In the current experiment, the enhancement factor is mainly limited by the precision of incident angle, for which ordinary rotation stages are probably not adequate enough. Moreover, traditional energy ratio of pump and probe pulses, which is 9:1, may not be ideal and could be changed to 2:1 in the reflection geometry. Considering all the above factors, the enhancement on the order of 1000 is possible in the current experiment. Nevertheless, near-Brewster angle reflection will enhance both the signal and the noise caused by the signal itself, therefore this method only works if the noise is unrelated to the signal, particularly if the noise is caused by the fluctuation in the probe. It cannot improve the signal to noise ratio when the dominate noise is from the signal itself. The theoretical results here agree reasonably well with published experiment results and pave way for realizing even higher enhancement at nearer-Brewster angle.
APA, Harvard, Vancouver, ISO, and other styles
50

Sathish, Kaveripakam, Monia Hamdi, Ravikumar Chinthaginjala Venkata, et al. "Acoustic Wave Reflection in Water Affects Underwater Wireless Sensor Networks." Sensors 23, no. 11 (2023): 5108. http://dx.doi.org/10.3390/s23115108.

Full text
Abstract:
The phenomenon of acoustic wave reflection off fluid–solid surfaces is the focus of this research. This research aims to measure the effect of material physical qualities on oblique incidence acoustic attenuation across a large frequency range. To construct the extensive comparison shown in the supporting documentation, reflection coefficient curves were generated by carefully adjusting the porousness and permeability of the poroelastic solid. The next stage in determining its acoustic response is to determine the pseudo-Brewster angle shift and the reflection coefficient minimum dip for the previously indicated attenuation permutations. This circumstance is made possible by modeling and studying the reflection and absorption of acoustic plane waves encountering half-space and two-layer surfaces. For this purpose, both viscous and thermal losses are taken into account. According to the research findings, the propagation medium has a significant impact on the form of the curve that represents the reflection coefficient, whereas the effects of permeability, porosity, and driving frequency are relatively less significant to the pseudo-Brewster angle and curve minima, respectively. This research additionally found that as permeability and porosity increase, the pseudo-Brewster angle shifts to the left (proportionally to porosity increase) until it reaches a limiting value of 73.4 degrees, and that the reflection coefficient curves for each level of porosity exhibit a greater angular dependence, with an overall decrease in magnitude at all incident angles. These findings are given within the framework of the investigation (in proportion to the increase in porosity). The study concluded that when permeability declined, the angular dependence of frequency-dependent attenuation reduced, resulting in iso-porous curves. The study also discovered that the matrix porosity largely affected the angular dependency of the viscous losses in the range of 1.4 × 10−14 m2 permeability.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!