Results 51 to 60 of about 337,933 (137)

Effect of Crystal Symmetry of Lead Halide Perovskites on the Optical Orientation of Excitons

Advanced Science, Volume 12, Issue 15, April 17, 2025.
Lead halide perovskite semiconductors provide a platform for studying crystal symmetry effects on spin‐dependent properties via optical orientation of exciton and carrier spins. This study examines exciton spin polarization at 1.6 K in nearly cubic and orthorhombic perovskites.
Nataliia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin, Ina V. Kalitukha, Ilya A. Akimov, Mikhail O. Nestoklon, Bekir Turedi, Oleh Hordiichuk, Dmitry N. Dirin, Maksym V. Kovalenko, Manfred Bayer   +10 more
wiley   +1 more source

Enhanced localization of Dyakonov-like surface waves in left-handed materials [PDF]

Physical Review B, 2006
We address the existence and properties of hybrid surface waves forming at interfaces between left-handed materials and dielectric birefringent media. The existence conditions of such waves are found to be highly relaxed in comparison to Dyakonov waves existing in right-handed media.
Crasovan, L C, Takayama, Osamu, Artigas García, David, Johansen, S K, Mihalache, Dumitru, Torner Sabata, Lluís   +5 more
openaire   +3 more sources

Enhanced Cherenkov radiation in twisted hyperbolic Van der Waals crystals

InfoScience, Volume 2, Issue 1, March 2025.
Efficient Cherenkov radiation over a wide range of momenta is highly demanded for many applications but still remains a challenging task. Here, we demonstrated that twisted hyperbolic Van der Waals crystals enable enhancement of Cherenkov radiation in a broad range of wave vectors.
Hao Hu, Xiao Lin, Guangwei Hu, Francisco J. Garcia‐Vidal, Yu Luo   +4 more
wiley   +1 more source

Terahertz Response of Field-Effect Transistors in Saturation Regime

, 2010
We report on the broadband THz response of InGaAs/GaAs HEMTs operating at 1.63 THz and room temperature deep in the saturation regime. We demonstrate that responses show linear increase with drain-to-source voltage (or drain bias current) and reach very ...
Elkhatib T. A., Fjeldly T. A., M. S. Shur, S. Rumyantsev, T. A. Elkhatib, V. Yu. Kachorovskii, W. J. Stillman, X.-C. Zhang   +7 more
core   +1 more source

Determination of dissipative Dyakonov surface waves using a finite element method based eigenvalue algorithm.

Optics Express, 2017
A full-vectorial finite element method is developed to analyze the surface waves propagating at the interface between two media which could be dissipative particularly.
Pi-Kuei Shih, H. Hsiao, Hung-chun Chang
semanticscholar   +1 more source

Terahertz Radiation Detectors Using CMOS Compatible SOI Substrates

Advanced Functional Materials, Volume 34, Issue 41, October 8, 2024.
In this review, the recent advances in silicon‐based room temperature Terahertz (THz) detectors using silicon‐on‐insulator substrates are presented, demonstrating their great potential to facilitate high performance, low power consumption, and scalability — qualities essential for advancing next‐generation photon detection technologies.
Md Soyaeb Hasan, Asif Abdullah Khan, Shamaila Shahzadi, Majid Haji Bagheri, Dayan Ban   +4 more
wiley   +1 more source

Ultralong‐Term High‐Density Data Storage with Atomic Defects in SiC

Advanced Functional Materials, Volume 34, Issue 27, July 3, 2024.
A concept of ultralong, high‐density data archiving based on optically active atomic‐size defects in silicon carbide (SiC) is proposed. The information is written in these defects by focused ion beams and read using photoluminescence or cathodoluminescence. The temperature‐dependent deactivation of these defects suggests a retention time minimum over a
M. Hollenbach, C. Kasper, D. Erb, L. Bischoff, G. Hlawacek, H. Kraus, W. Kada, T. Ohshima, M. Helm, S. Facsko, V. Dyakonov, G. V. Astakhov   +11 more
wiley   +1 more source

Electrical excitation of shock and soliton-like waves in two-dimensional electron channels

, 2007
We study electrical excitation of nonlinear plasma waves in heterostructures with two-dimensional electron channels and with split gates, and the propagation of these waves using hydrodynamic equations for electron transport coupled with two-dimensional ...
A. A. Ivanov, A. Ivanov, A. V. Chaplik, A. Y. Shik, C. A. J. Fletcher, E. Vostrikova, F. Teppe, I. Semenikhin, L. D. Landau, M. I. Dyakonov, R. Sagdeev, V. Ryzhii   +11 more
core   +1 more source

Melting of Wigner crystal in high-mobility $n$-GaAs/AlGaAs heterostructures at filling factors $0.18 > \nu > 0.125$: Acoustic studies

, 2016
Using acoustic methods the complex high-frequency conductance of high-mobility $n$-GaAs/AlGaAs heterostructures was determined in magnetic fields 12$\div$18~T.
Drichko, I. L., Galperin, Y. M., Pfeiffer, L. N., Smirnov, I. Yu., Suslov, A. V., West, K. W.   +5 more
core   +1 more source

Stabilizing Phosphorene‐Like Group IV–VI Compounds via van der Waals Imprinting for Multistate Ferroelectricity and Tunable Spin Transport

Advanced Electronic Materials, Volume 10, Issue 6, June 2024.
The enabling power of van der Waals imprinting is invoked to stabilize metastable group IV–VI compounds, as exemplified by the Black‐phosphorene‐like puckered GeTe on the (001) surface of the isostructural ground‐state phase of SnSe. Remarkably, the as‐grown IV–VI heterostructures harbor significantly enhanced spontaneous polarization and multistate ...
Muhammad Usman Muzaffar, Chuanbao Zhang, Shunhong Zhang, Ping Cui, Zhenyu Zhang   +4 more
wiley   +1 more source