Results 71 to 80 of about 225,065 (306)

Memristive Motion‐Streak Neuron for Spatiotemporal Multiple Object Detection

Advanced Materials, EarlyView.
This work proposes motion‐streak neuron hardware using amorphous In–Ga–Zn–O optoelectronic memristors and dynamic memristors for spatiotemporal multiple‐object detection. The motion streak neuron array processes optical and electrical stimuli, allowing speed‐dependent filament relaxation to encode motion trajectories.
Hyungjun Park, Jin Hong Kim, Hyun Wook Kim, Néstor Ghenzi, Sung Keun Shim, Joon‐Kyu Han, Min Jung Chung, Dong Hoon Shin, Kyung Seok Woo, Cheol Seong Hwang   +9 more
wiley   +1 more source

Femtosecond Pulses Generation From a Diode-Pumped Yb:CaNb₂O₆ Disordered Crystal Laser

IEEE Access, 2017
We experimentally demonstrated a diode-pumped femtosecond Yb:CaNb2O6 disordered crystal laser. Pumping by a 978-nm fiber coupled laser diode and assisting by a semiconductor saturable absorber mirror, stable continuous-wave mode-locked laser pulses with ...
Zi-Ye Gao, Jiang-Feng Zhu, Zhi-Yi Wei, Zheng-Mao Wu   +3 more
doaj   +1 more source

Low‐Temperature Gold Deposition Improves CdTe Back Contacts

Advanced Materials Interfaces, EarlyView.
Cd(Se,Te) samples are cooled during the evaporation of Au back contacts to thermally quench CdTe degradation. Reduced temperature during Au evaporation boosts PV efficiency, open‐circuit voltage, and fill factor. XPS associates these improvements with less chemical perturbation of the CdTe surface during metallization.
Christopher P. Muzzillo, Ryan Muzzio, Craig L. Perkins, B. Edward Sartor, Matthew O. Reese, Chungho Lee   +5 more
wiley   +1 more source

A 7.08-kW YAG/Nd:YAG/YAG Composite Ceramic Slab Laser with Dual Concentration Doping

IEEE Photonics Journal, 2017
The theoretical design and experiment research on the YAG/Nd:YAG/YAG composite ceramic slab laser amplifier were conducted. The numerical analysis was used to obtain the design of YAG/Nd:YAG/YAG composite ceramic slab. A high optical
Mi Li, Hao Hu, Qingsong Gao, Juntao Wang, Jian Zhang, Yingcheng Wu, Tangjian Zhou, Liu Xu, Chun Tang, Na Zhao, Peng Liu   +10 more
doaj   +1 more source

Advanced Manufacturing of Composite‐Based Systems for Energy Applications

Advanced Materials Technologies, EarlyView.
Advanced manufacturing enables the integration of polymers, ceramics, metal oxides, and composites into architected microstructures with tailored transport pathways. By coupling material selection, manufacturing strategy, and structural design, multifunctional energy systems can simultaneously improve electrochemical performance, thermal management ...
Sri Vaishnavi Thummalapalli, Dhanush Patil, Libin Yang, M. Taylor Sobczak, Anshul Kulkarni, Xiao Sun, Arunachalam Ramanathan, Tiantian Li, Ramaraja P. Ramasamy, Jason J. Locklin, Yanyu Chen, Xianqiao Wang, Arunachala Mada Kannan, Kenan Song   +13 more
wiley   +1 more source

High Power Continuous Wave Yb:YAG Composite Crystal Zigzag Slab Amplifier at Room Temperature

IEEE Photonics Journal, 2017
A 7.07-kW Yb:YAG composite crystal zigzag slab amplifier at room temperature is developed and demonstrated, the optical-to-optical efficiency is about 29.5% and the slope efficiency is 39.5%, respectively, with the pumping power of 19.98 kW
Mi Li, Tangjian Zhou, Liu Xu, Qingsong Gao, Hao Hu, Yingcheng Wu, Dan Wang, Jianmin Li, Jun Lei, Wenqiang Lv, Yi Yu, Zhenhai Wu, Na Zhao   +12 more
doaj   +1 more source

Strong Photoluminescence Enhancement in All‐Dielectric Ge Thin Film Metasurfaces for Integration on the Si Platform

Advanced Optical Materials, EarlyView.
Germanium (Ge) all‐dielectric metasurfaces can be leveraged to strongly enhance the radiative emission from Ge layers grown on silicon‐on‐insulator substrates by industry‐standard processes. At room‐temperature, the narrowband photoluminescence (PL) intensity is enhanced by a factor ∼40× with respect to unstructured films.
Jon Schlipf, Diana Ryzhak, Giovanni Capellini, Paul Oleynik, Oliver Skibitzki, Yuji Yamamoto, Inga A. Fischer   +6 more
wiley   +1 more source

Highly Crystalline CsPbBr3 Thin Films With Amplified Spontaneous Emission via High‐Pressure Recrystallization

Advanced Optical Materials, EarlyView.
High‐pressure recrystallization provides a reproducible route to high‐quality CsPbBr3${\rm CsPbBr}_{3}$ thin films. Optimized processing at 300 bar yields smooth, pinhole‐free, single‐phase 3D perovskite layers with tunable thickness, enhanced crystallinity, reduced amplified‐spontaneous‐emission threshold, improved photostability, and phase‐transition
Asma Miled, Trong Tam Nguyen, Thi Anh Vui Nguyen, José Penuelas, Aziz Benamrouche, Céline Chevalier, Thi Kim Anh Hoang, Gaëlle Trippé‐Allard, Elsa Cassette, Brice Devif, Emmanuel Drouard, Emmanuelle Deleporte, Hanh Hong Mai, Abdelaziz Bouazizi, Christian Seassal, Hai Son Nguyen   +15 more
wiley   +1 more source

A high-energy 1064-nm picosecond master oscillator laser with an optic-optic efficiency of 38%

AIP Advances, 2018
A high-energy high optic-optic efficiency 808-nm diode-end-pumped 1064-nm Nd:YVO4 picosecond master oscillator laser was demonstrated, and a 3×3×7 mm Nd:YVO4 crystal with a doped concentration of 0.5% was adopted.
Huan He, Xuesheng Liu, Yiheng Song, Congcong Wang, Mingzhen Cao, Zhiyong Wang   +5 more
doaj   +1 more source

Medium-power diode-pumped Nd:BaY2F8 laser

Optics Express, 2003
We report what is to our knowledge the first Nd:BaY2F8 (Nd:BaYF) laser pumped with a multiwatt fiber-coupled diode array tuned at approximately 804 nm. As much as 2.4 W were obtained with 6.2 W of absorbed pump power, showing efficient operation (51% slope efficiency), excellent beam quality (M2=1.1), and weak thermal lensing. Small intracavity losses (
Agnesi A, Guandalini A, Lucca A, Sani E, TONCELLI, ALESSANDRA, TONELLI, MAURO, Dell'Acqua S.   +6 more
openaire   +5 more sources