Relevant bibliographies by topics / Nonlinear terahertz conductivity

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Nonlinear terahertz conductivity'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Nonlinear terahertz conductivity"

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XU, X. G., and J. C. CAO. "NONLINEAR RESPONSE INDUCED STRONG ABSORPTANCE OF GRAPHENE IN THE TERAHERTZ REGIME." Modern Physics Letters B 24, no. 21 (2010): 2243–49. http://dx.doi.org/10.1142/s0217984910024626.

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We have calculated the fifth-order nonlinear optical response at experimentally relevant field strengths within the model of massless Dirac fermions by coupling the massless Dirac fermions to the time-dependent electric field quantum mechanically. It demonstrates that the fifth-order nonlinear optical response plays an important role in the contribution to the optical conductivity of pristine single-layer graphene in the low frequency part of the terahertz regime. The nonlinear effect can enhance the optical activity of single-layer graphene in the terahertz regime and significantly decreases
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Li, Quan, Shuang Wang, and Tai Chen. "Nonlinear Modulation of Plasmonic Resonances in Graphene-Integrated Triangular Dimers at Terahertz Frequencies." Materials 12, no. 15 (2019): 2466. http://dx.doi.org/10.3390/ma12152466.

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Metamaterials made from artificial subwavelength structures hold great potential in designing functional devices at microwave, terahertz, infrared, and optical frequencies. In this work, we study the active switching effect of the plasmonic resonance modes in triangular dimer (DTD) structure using graphene in the terahertz regime. The sole DTD structure can only support a dipolar bonding dimer plasmonic (BDP) mode, whose field enhancement factor at the gap center can reach 67.4. However, with a metallic junction in the dimer, the BDP mode switches to a charge transfer plasmonic (CTP) mode. Whe
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Zhong, Y., W. Feng, Zheng Liu, C. Zhang, and J. C. Cao. "Nonlinear optical conductivity of Weyl semimetals in the terahertz regime." Physica B: Condensed Matter 555 (February 2019): 81–84. http://dx.doi.org/10.1016/j.physb.2018.11.051.

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SHOROKHOV, ALEXEY V., and KIRILL N. ALEKSEEV. "THEORETICAL BACKGROUNDS OF NONLINEAR THz SPECTROSCOPY OF SEMICONDUCTOR SUPERLATTICES." International Journal of Modern Physics B 23, no. 20n21 (2009): 4448–58. http://dx.doi.org/10.1142/s0217979209063584.

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We consider terahertz absorption and gain in a single miniband of semiconductor superlattice subject to a bichromatic electric field in the most general case of commensurate frequencies of the probe and pump fields. Using an exact solution of Boltzmann transport equation, we show that in the small-signal limit the formulas for absorption always contain two distinct terms related to the parametric and incoherent interactions of miniband electrons with the alternating pump field. It provides a theoretical background for a control of THz gain without switching to the negative differential conduct
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Kang, Ji-Hun, Dai-Sik Kim, and Minah Seo. "Terahertz wave interaction with metallic nanostructures." Nanophotonics 7, no. 5 (2018): 763–93. http://dx.doi.org/10.1515/nanoph-2017-0093.

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AbstractUnderstanding light interaction with metallic structures provides opportunities of manipulation of light, and is at the core of various research areas including terahertz (THz) optics from which diverse applications are now emerging. For instance, THz waves take full advantage of the interaction to have strong field enhancement that compensates their relatively low photon energy. As the THz field enhancement have boosted THz nonlinear studies and relevant applications, further understanding of light interaction with metallic structures is essential for advanced manipulation of light th
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Demsar, Jure, Richard D. Averitt, Antoinette J. Taylor, et al. "Photoinduced Conductivity Dynamics Studies of MgB2 Thin Films." International Journal of Modern Physics B 17, no. 18n20 (2003): 3675–81. http://dx.doi.org/10.1142/s0217979203021605.

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We present the first direct studies of photoinduced Cooper-pair breaking and subsequent superconducting state recovery dynamics by means of femtosecond time-resolved optical-pump terahertz probe spectroscopy focusing on the superconducting state recovery dynamics in MgB 2. The superconducting state recovery proceeds on the timescale of several hundred picoseconds and shows a strong temperature dependence. In particular, upon increasing the temperature the recovery time first decreases, reaches a minimum, followed by a quasi-divergence upon further increasing the temperature towards Tc. Moreove
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Teng, Da, Kai Wang, and Zhe Li. "Graphene-Coated Nanowire Waveguides and Their Applications." Nanomaterials 10, no. 2 (2020): 229. http://dx.doi.org/10.3390/nano10020229.

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In recent years, graphene-coated nanowires (GCNWs) have attracted considerable research interest due to the unprecedented optical properties of graphene in terahertz (THz) and mid-infrared bands. Graphene plasmons in GCNWs have become an attractive platform for nanoscale applications in subwavelength waveguides, polarizers, modulators, nonlinear devices, etc. Here, we provide a comprehensive overview of the surface conductivity of graphene, GCNW-based plasmon waveguides, and applications of GCNWs in optical devices, nonlinear optics, and other intriguing fields. In terms of nonlinear optical p
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Singh, Ranjan, Jie Xiong, Abul K. Azad, et al. "Optical tuning and ultrafast dynamics of high-temperature superconducting terahertz metamaterials." Nanophotonics 1, no. 1 (2012): 117–23. http://dx.doi.org/10.1515/nanoph-2012-0007.

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AbstractThrough the integration of semiconductors or complex oxides into metal resonators, tunable metamaterials have been achieved by a change of environment using an external stimulus. Metals provide high conductivity to realize a strong resonant response in metamaterials; however, they contribute very little to the tunability. The complex conductivity in high-temperature superconducting films is highly sensitive to external perturbations, which provides new opportunities in achieving tunable metamaterials resulting directly from the resonant elements. Additionally, superconducting metamater
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Che, Yong-Li, Xiao-Long Cao, and Jian-Quan Yao. "Tunable and switchable resonance in optically-controlled nested metamaterials at terahertz frequencies." Modern Physics Letters B 30, no. 03 (2016): 1650011. http://dx.doi.org/10.1142/s0217984916500111.

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The asymmetrical nested metamaterial, composed of two split-ring resonators (SRRs) and two embedded gallium arsenide (GaAs) islands placed in the two SRRs, has been elaborately designed on quartz substrate. Its tunable and switchable resonances at terahertz (THz) frequencies are numerically demonstrated here based on different conductivities of GaAs, which can be transformed from semiconductor to metallic state through appropriate optical excitation. Without photoexcitation, our designed metamaterial has three resonance peaks in the range of monitored frequency range, and they are located at 0
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Liu, Zheng, Matthew Sanderson, Chao Zhang, and J. C. Cao. "Nonlinear optical conductivity of bilayer graphene with Rashba spin-orbit interaction in the terahertz regime." Journal of Applied Physics 118, no. 4 (2015): 043106. http://dx.doi.org/10.1063/1.4927512.

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Dissertations / Theses on the topic "Nonlinear terahertz conductivity"

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Kadlec, Josef. "Optické nelinearity terahertzového záření." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-416036.

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Conductivity of semicoductor nanostructures has its maximum in terahertz spectral range. Linear response is described in reasonable detail. With high intensity light sources it is also needed to be concerned with nonlinear response. In this thesis, there is firstly described already existing quantum model of linear conductivity which is using perturbation theory. This model is then extended by adding another perturbations, getting us quantum model for calculating nonlinear conductivity of arbitrary order. Model is then applied for calculation of third order nonlinear conductivity spectra for c
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Kuchařík, Jiří. "Studium transportu náboje v polovodičových nanostrukturách pomocí časově rozlišené multi-terahertzové spektroskopie." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-404545.

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Terahertz conductivity spectra contain information on charge transport mechanisms and charge confinement on nanometer distances. In this thesis, we make a substantial progress in understanding of terahertz conductivity in several regimes. First, we theoretically investigate linear terahertz conductivity of confined electron gas: while the spectra of degenerate electron gas exhibit geometrical resonances, the response in non-degenerate case smears into a single broad resonance due to the wide distribution of charge velocities. Then, we theoretically and experimentally analyze various TiO2 nanot
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Conference papers on the topic "Nonlinear terahertz conductivity"

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Mics, Zoltan, Mischa Bonn, Klaas-Jan Tielrooij, and Dmitry Turchinovich. "Nonlinear terahertz conductivity in graphene." In 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013). IEEE, 2013. http://dx.doi.org/10.1109/irmmw-thz.2013.6665559.

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2

Markelz, A. G. "High Field Pulsed Terahertz Measurements of Nonlinear Conductivity." In Nonlinear Optics: Materials, Fundamentals and Applications. OSA, 2000. http://dx.doi.org/10.1364/nlo.2000.tub18.

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