Results 101 to 110 of about 3,742 (297)

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

High Performance GaSb-Based DBR Laser with On-Chip Integrated Power Amplifier via Gain-Match Design

Applied Sciences
We reported on a single-longitudinal-mode operated distributed Bragg reflector laser diode emitting at 1950 nm with an on-chip integrated power amplifier.
Juntian Cao, Chengao Yang, Yihang Chen, Hongguang Yu, Jianmei Shi, Haoran Wen, Zhengqi Geng, Zhiyuan Wang, Hao Tan, Yu Zhang, Donghai Wu, Yingqiang Xu, Haiqiao Ni, Zhichuan Niu   +13 more
doaj   +1 more source

Ion‐Reconfigurable “N”‐Shaped Antiambipolar Behavior in Organic Electrochemical Transistors

Advanced Materials, EarlyView.
A unique N‐shaped negative differential transconductance (NDT) characteristics is demonstrated in single‐polymer organic electrochemical transistors through a sequential doping–redox–doping process driven by iodide ions. This redox‐driven mechanism enables low‐voltage, ion‐controlled reconfigurability and tunable current modulation, allowing seamless ...
Debdatta Panigrahi, Daniele Zucchelli, Zeinab Hamid, Christina Kousseff, Arup Sarkar, Aristea Pavlou, Zhitian Ling, Somayeh Kashani, Iain McCulloch, Paul W. M. Blom, Fabrizio Torricelli, Paschalis Gkoupidenis   +11 more
wiley   +1 more source

FREQUENCY AND TEMPORAL COHERENCE PROPERTIES OF DISTRIBUTED BRAGG REFLECTOR LASER

, 2010
This article presents the investigation of frequency and temporal coherence properties of distributed Bragg reflector laser. In this scheme, a square-wavefrom voltage is applied to the phase section of the laser to little optical wavelength, and delayed ...
Zhang HG (Zhang Hong Guang), Wang X (Wang Xin), Man JW (Man Jiang Wei), Liu Y (Liu Yu), Zhu, NH, CAS, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China. E-mail Address: nhzhu@semi.ac.cn, Zhao LJ (Zhao Ling Juan), Zhu NH (Zhu Ning Hua), Wang W (Wang Wei), Ke JH (Ke Jian Hong), Chen W (Chen Wei), Yuan HQ (Yuan Hai Qing), Xie L (Xie Liang)   +11 more
core  

Photonic integrated circuits for terahertz source generation

IET Optoelectronics, 2020
The authors introduce four kinds of terahertz photonics components based on photonic integrated circuits (PICs). A PIC‐based integrated optoelectronic synthesiser for THz communications is described, which can be tuned continuously over the range 0.254–2.
Lianping Hou, Song Tang, Bin Hou, John H. Marsh   +3 more
doaj   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

Advanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria, Meng Yin, Stefan Neuhauser, Vlasis G. Mavrantzas, Ying Chen, Ken Suzuki, Andreas T. Güntner   +6 more
wiley   +1 more source

Demonstration of Distributed Etched Diffraction Grating Demultiplexer

IEEE Photonics Journal, 2011
The design principles and measurement results for a compact shallow etched distributed diffraction grating waveguide demultiplexer are presented. The deeply etched diffraction grating facets are replaced with a shallow etched odd-order quarter wavelength
Amir Jafari, Andrew G. Kirk
doaj   +1 more source

Lattice‐Matched 2D Template Enables Efficient Cesium Tin Halide Perovskite Solar Cells

Advanced Materials, EarlyView.
Lattice‐matched 2D perovskite PEA2CsSn2I7 templates the out‐of‐plane growth of inorganic 3D γ‐CsSnI3 along the (110) plane, forming highly oriented 2D/3D tin halide perovskite heterostructures. With reduced trap states and mitigated δ‐phase impurities, the CsSnI3‐based solar cells achieve a power conversion efficiency of 15.27% and maintain stable ...
Hongzhe Anna Xu, Dongxu He, Wencai Zhou, Julian A. Steele, Zhiliang Wang, Zitong Wang, Chengxi Zhang, Shanshan Ding, Bowei Zhang, Huiyuan Cheng, Mengmeng Hao, Jiangyu Hang, Can Zheng, Zilong Zheng, Peng Chen, Lianzhou Wang   +15 more
wiley   +1 more source

Numerical and experimental studies of a distributed Bragg reflector laser [PDF]

, 2018
We report in this paper theoretical and experimental results on the dynamical properties of a distributed Bragg reflector (DBR) semiconductor lasers. Using the traveling wave equation model, we show that a proper choice of coupling coefficient and front ...
REGGENTIN, M., WIEDMANN, J., RADZIUNAS, M., KNIGGE, A., TRONCIU, V. Z., WENZEL, H.   +5 more
core  

Surface Vertical Multi-Emission Laser with Distributed Bragg Reflector Feedback from CsPbI₃ Quantum Dots. [PDF]

Nanomaterials (Basel), 2023
Su X, Pan Y, Gao D, Wang J, Yu H, Chen R, Guan B, Yang X, Wang Y, Wang L.   +9 more
europepmc   +1 more source