Results 81 to 90 of about 36,061 (262)

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

Advanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu, Fulu Zheng, San‐Dong Guo, Thomas Frauenheim, Zhaobo Zhou, Junjie He   +5 more
wiley   +1 more source

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Characteristics of transition metal dichalcogenides in optical pumped modulator of terahertz wave

AIP Advances, 2020
To study the characteristics of transition metal dichalcogenides (TMDCs) in the THz regime, several kinds of terahertz modulators based on TMDCs were fabricated.
Zhiyuan Fan, Zhaoxin Geng, Weihao Fang, Xiaoqing Lv, Yue Su, Shicai Wang, Jian Liu, Hongda Chen   +7 more
doaj   +1 more source

Y-coupled Terahertz Quantum Cascade Lasers [PDF]

Conference on Lasers and Electro-Optics 2012, 2012
Here we demonstrate a Y coupled terahertz (THz) quantum cascade laser (QCL) system. The two THz QCLs working around 2.85 THz are driven by independent electrical pulsers. Total peak THz output power of the Y system, with both arms being driven synchronously, is found to be more than the linear sum of the peak powers from the individual arms; 10.4 mW ...
Chakraborty, Subhasish, Marshall, Owen P., Khairuzzaman, Md, Beere, Harvey E., Ritchie, David A.   +4 more
openaire   +2 more sources

An Intelligent Magneto‐Mechanical Platform for Cellular Sensing in 3D Microenvironments

Advanced Science, EarlyView.
This study presents MagMI, a pioneering machine intelligence‐driven magneto‐mechanical sensing platform. It utilizes magneto‐mechanical arrays and machine learning to achieve label‐free, real‐time monitoring and classification of cellular proliferation dynamics within 3D microenvironments.
Yue Quan, Yuxin Wang, Sen Ding, Bingpu Zhou, Yinning Zhou   +4 more
wiley   +1 more source

Pulsed THz radiation due to phonon-polariton effect in [110] ZnTe crystal

, 2012
Pulsed terahertz (THz) radiation, generated through optical rectification (OR) by exciting [110] ZnTe crystal with ultrafast optical pulses, typically consists of only a few cycles of electromagnetic field oscillations with a duration about a couple of ...
C. C. Chi, C. M. Tu, C. W. Luo, J. C. Chen, Lee Y.-S., S. A. Ku, Shen Y. R., W. C. Chu   +7 more
core   +1 more source

Label‐Free and Immobilization‐Free Protein‐Binding Assays by Ultraviolet Transient Absorption Microscopy

Advanced Science, EarlyView.
A femtosecond UV pump–probe microscope resolves binding‐induced changes in protein excited‐state dynamics and converts these intrinsic contrasts into an equilibrium affinity readout. By probing tryptophan responses directly in solution, the approach enables quantitative determination of dissociation constants without labeling or immobilization ...
Jianghao Shen, Qiangqiang Wang, Fan Wu, Yang Gao, Lu Lan, Pu Wang   +5 more
wiley   +1 more source

Modification of spintronic terahertz emitter performance through defect engineering

, 2019
Spintronic ferromagnetic/non-magnetic heterostructures are novel sources for the generation of THz radiation based on spin-to-charge conversion in the layers.
Battiato, Marco, Beigang, Rene, Binder, Rolf H., Brodyanski, Alexander, Keller, Sascha, Losch, Jörg, Nenno, Dennis M., Papaioannou, Evangelos Th., Rahm, Marco, Scheuer, Laura, Schneider, Hans C., Sokoluk, Dominik, Torosyan, Garik   +12 more
core   +1 more source

Terahertz tomography using quantum-cascade lasers [PDF]

Optics Letters, 2012
The interfaces of a dielectric sample are resolved in reflection geometry using light from a frequency agile array of terahertz quantum-cascade lasers. The terahertz source is a 10-element linear array of third-order distributed-feedback QCLs emitting at discrete frequencies from 2.08 to 2.4 THz. Emission from the array is collimated and sent through a
Kao, Tsung-Yu, Hu, Qing, Reno, John L., Lee, Alan, Burghoff, David Patrick   +4 more
openaire   +3 more sources

Interfacial Synergy in a Band‐Aligned Low‐Dimensional Heterojunction Toward Broadband Photodetection

Advanced Science, EarlyView.
Monolithically integrating sensing and communication, a Ta2NiSe5/Sb2Te3 heterojunction achieves visible‐to‐near‐infrared photovoltaics with high‐speed terahertz photo‐thermoelectric detection at room temperature. By engineering a Type‐II van der Waals heterojunction, we overcome the intrinsic spectral limitations and disparate physical requirements of ...
Yuanfeng Wen, Kening Xiao, Yao Yang, Mengjie Jiang, Libo Zhang, Shicong Hou, Hang Ma, Yunduo Zhang, Wenqi Mo, Yiran Tan, Bolang Peng, Jinqiu Huang, Xueyuan Wei, Chunming Liu, Bangjian Zhao, Jiale He, Qing Li, Songyuan Ding, Yi Zhou, Guanhai Li, Xiaoshuang Chen   +20 more
wiley   +1 more source