Results 61 to 70 of about 65,222 (316)

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

Fast Terahertz Computed-Tomography Imaging With a Quantum-Cascade Laser and a Scanning Mirror

, 2013
A terahertz transmission imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. In order to reduce artifacts, special care was taken on the optics and the conversion of the measured
H.-W. Hubers, H. Richter, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Hübers, Heinz-Wilhelm, Wienold, Martin, Rothbart, Nick, M. Wienold, L. Schrottke, H. T. Grahn, N. Rothbart   +11 more
core   +1 more source

Spectrally resolved wave-mixing between near- and far-infrared pulses in gas [PDF]

, 2013
We investigate the nonlinear wave-mixing in gases between intense, short optical pulses and long-wavelength fields (mid infrared and terahertz). We show numerically that the beating between the sum- and difference-frequency generation components can be ...
Schmidt, Bruno E., Ozaki, T, Morandotti, R., M Clerici (16177538), Caspani, Lucia, M Shalaby (12138066), Shalaby, M., Vidal, Francois, Ozaki, Tsuneyuki, D Faccio (16177541), B Schmidt (9979535), Clerici, Matteo, Peccianti, M, F Vidal (6971162), Morandotti, Robert, T Ozaki (16177550), Yaakobi, O., Caspani, L, Peccianti, Marco, Schmidt, Bruno E, Shalaby, Mostafa, Marco Peccianti (4464661), Clerici, M, L Caspani (16177544), F Légaré (13690585), Légaré, François, Vidal, F., Morandotti, R, Yaakobi, Oded, O Yaakobi (16177547), Faccio, Daniele, Shalaby, M, Faccio, D, Schmidt, B E, Yaakobi, O, R Morandotti (16168658), Vidal, F, Légaré, F   +37 more
core   +1 more source

Spatial Terahertz Modulator [PDF]

Scientific Reports, 2013
Terahertz (THz) technology is a developing and promising candidate for biological imaging, security inspection and communications, due to the low photon energy, the high transparency and the broad band properties of the THz radiation1,2,3. However, a major encountered bottleneck is lack of efficient devices to manipulate the THz wave, especially to ...
Xie, Zhenwei, Wang, Xinke, Ye, Jiasheng, Feng, Shengfei, Sun, Wenfeng, Akalin, Tahsin, Zhang, Yan   +6 more
openaire   +2 more sources

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

Terahertz Reconfigurable Planar Graphene Hybrid Yagi–Uda Antenna

Nanomaterials
In this paper, we design a frequency reconfigurable antenna for terahertz communication. The antenna is based on a Yagi design, with the main radiating elements being a pair of dipole antennas printed on the top and bottom of a dielectric substrate ...
Qimeng Liu, Renbin Zhong, Boli Xu, Jiale Dong, Gefu Teng, Ke Zhong, Zhenhua Wu, Kaichun Zhang, Min Hu, Diwei Liu   +9 more
doaj   +1 more source

Dipole‐Engineered Conductive Additives for Ultrastable Interphase Evolution in High‐Areal‐Capacity Silicon Anodes

Advanced Functional Materials, EarlyView.
In the work reported herein, dipole‐engineered sulfonated carbon nanofibers enable conductive additives to actively regulate interphase formation in silicon anodes. Polar sulfonyl groups guide electrolyte decomposition to form a compact LiF‐rich interphase while promoting robust integration with silicon.
Song Kyu Kang, Hyeonju Kim, Jeongbin Cho, Minseon Park, Taehun Kim, Seonghun Sin, Won Bae Kim   +6 more
wiley   +1 more source

Terahertz Pulse Shaping using Microwave-Photonic Delay Line Filters

, 2021
We propose an all-optical multi-band raised-cosine filter with tunable bandwidth for multi-channel IEEE 802.15.3d Standard-compliant terahertz communications using only a single-tap microwave photonic filter.Mohamed Shehata, Ke Wang, Withawat ...
Ke Wang, Shehata, M., Mohamed Shehata, Withawat Withayachumnankul, Wang, K., Withayachumnankul, W.   +5 more
core   +1 more source

Oxidized MoS2‐Based Multifunctional Memristive Hardware for Energy‐Efficient mmWave Signal Processing and In‐Memory Matrix Multiplication

Advanced Functional Materials, EarlyView.
Thermally oxidized MoS2‐based radio‐frequency switches enable a multifunctional platform that unifies broadband RF switching and in‐memory computation. The device achieves a cutoff frequency of 33.2 THz with high energy efficiency and supports hardware‐aware signal processing.
Juho Son, Changwoo Pyo, Sungmoon Park, Yoongi Cho, Seungchan Lee, Myungsoo Kim   +5 more
wiley   +1 more source

Time‐Resolved Magnetization Switching Dynamics Driven by Orbital Torques

Advanced Functional Materials, EarlyView.
Du et al. reveal nanosecond magnetization switching driven by orbital currents using time‐resolved Hall detection. The measurements separate domain nucleation from domain wall propagation and show that Joule heating strongly assists switching by lowering energy barriers.
Ao Du, Shilei Ding, Min‐Gu Kang, Marco Hoffmann, Pietro Gambardella   +4 more
wiley   +1 more source