Results 51 to 60 of about 36,720 (261)

Directivity Control of Terahertz Radiation from Single-Color Filament Plasma with Polypropylene Pipe

Photonics, 2023
Two-dimensional angular distribution of terahertz emission from single-color filamentation of laser pulses is experimentally studied. The use of a polypropylene pipe makes it possible to transform the angular pattern of terahertz radiation from the ...
Daria Mokrousova, Leonid Seleznev, Dmitrii Pushkarev, Georgy Rizaev, Maximilian Levus, Andrey Koribut, Yakov Grudtsyn   +6 more
doaj   +1 more source

Kinetics of spin coherence of electrons in $n$-type InAs quantum wells under intense terahertz laser fields

, 2008
Spin kinetics in $n$-type InAs quantum wells under intense terahertz laser fields is investigated by developing fully microscopic kinetic spin Bloch equations via the Floquet-Markov theory and the nonequilibrium Green's function approach, with all the ...
C. W. Gardiner, F. Meier, H. Haug, J. Fabian, J. H. Jiang, M. M. Glazov, M. M. Glazov, M. W. Wu, M. W. Wu, S. D. Ganichev, Y. A. Bychkov, Y. Zhou, Y. Zhou   +12 more
core   +1 more source

Nonlinear two-dimensional terahertz photon echo and rotational spectroscopy in the gas phase [PDF]

, 2016
Ultrafast two-dimensional spectroscopy utilizes correlated multiple light-matter interactions for retrieving dynamic features that may otherwise be hidden under the linear spectrum.
Fleischer, Sharly, Hwang, Harold Y., Lu, Jian, Nelson, Keith A., Ofori-Okai, Benjamin K., Zhang, Yaqing   +5 more
core   +2 more sources

Design concepts of terahertz quantum cascade lasers: Proposal for terahertz laser efficiency improvements

Applied Physics Letters, 2010
Conceptual disadvantages of typical resonant phonon terahertz quantum cascade lasers (THz-QCLs) are analyzed. Alternative designs and their combination within a concrete device proposal are discussed to improve the QCL performance. The improvements are (1) indirect pumping of the upper laser level, (2) diagonal optical transitions, (3) complete ...
Kubis, Tillmann, Mehrotra, Saumitra Raj, Klimeck, Gerhard   +2 more
openaire   +3 more sources

Spectrum of Terahertz Emission from Single-Color Filament Plasma under Different Laser Beam Focusing

Photonics, 2023
The spectrum of terahertz radiation generated in plasma of a single-color laser filament is observed, using a new technique based on obtaining two-dimensional angular distributions at different frequencies.
Georgy Rizaev, Dmitrii Pushkarev, Leonid Seleznev   +2 more
doaj   +1 more source

THz generation using a reflective stair-step echelon

, 2015
We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating.
Huang, W. Ronny, Nelson, Keith A., Ofori-Okai, Benjamin K., Sivarajah, Prasahnt   +3 more
core   +1 more source

Magic Wavelengths for Terahertz Clock Transitions [PDF]

, 2010
Magic wavelengths for laser trapping of boson isotopes of alkaline-earth Sr, Ca and Mg atoms are investigated while considering terahertz clock transitions between the $^{3}P_{0}, ^{3}P_{1}, ^{3}P_{2}$ metastable triplet states.
C. E. Moore, C. H. Corliss, J. Chen, Jingbiao Chen, Xia Xu, Xiaoji Zhou, Xuzong Chen   +6 more
core   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source

Terahertz Generation by Optical Rectification of 780 nm Laser Pulses in Pure and Sc-Doped ZnGeP₂ Crystals

Photonics, 2022
Terahertz wave generation through the optical rectification of 780 nm femtosecond laser pulses in ZnGeP2 crystals has been studied. All of the possible interactions of types I and II were analyzed by modeling and experimentally.
Vladimir Voevodin, Svetlana Bereznaya, Yury S. Sarkisov, Nikolay N. Yudin, Sergey Yu. Sarkisov   +4 more
doaj   +1 more source

Unlocking Multi‐Valley Energy Pockets and Interface‐Induced Phonon Filtering in InSb Thermoelectrics by Reaction‐Driven Interface Engineering

Advanced Functional Materials, EarlyView.
InSb, a narrow‐bandgap semiconductor with high carrier mobility, is promising for thermoelectric energy conversion but suffers from high lattice thermal conductivity and strong bipolar conduction. Here, in situ interface engineering using Co2O3 nanoprecursors forms hierarchical CoSbx/In2O3/CoSb3 heterostructures that enhance phonon scattering and ...
Jiwu Xin, Xiao Yang, Xiao‐Lei Shi, Chengyun Xu, Xi Ling, Pengyu Zhang, Jinfeng Dong, Yong Du, Haisheng Chen, Ting Zhang, Zhi‐Gang Chen   +10 more
wiley   +1 more source