Results 51 to 60 of about 372,503 (352)

Thermal Mapping of Power Semiconductors in H-Bridge Circuit

Applied Sciences, 2020
In this paper, a universal H-bridge circuit is used as a loading emulator to investigate the loss and thermal models of the power semiconductor. Based on its operation principle and modulation method, the dominating factors’ (e.g., power factor, loading ...
Dao Zhou, Yingzhou Peng, Francesco Iannuzzo, Michael Hartmann, Frede Blaabjerg   +4 more
doaj   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

First-principle calculations of Sb2S3 energy bands and electronic structures with different crystallization degrees

AIP Advances
Based on first-principles density functional theory, crystal structure models of antimony sulfide (Sb2S3) in three distinct crystalline states were constructed and the physical properties of these states were investigated.
Wanting Xiang, Dan Fang, Xuan Fang, Dengkui Wang, Hao Yan, Yong Wang, Jie Fan, Yonggang Zou, Xiaohua Wang   +8 more
doaj   +1 more source

An LDMOS VHF class-E power amplifier using a high-Q novel variable inductor [PDF]

, 1999
In this paper, an lateral diffused metal-oxide-semiconductor-based very high-frequency class-E power amplifier has been investigated theoretically and experimentally.
Rutledge, David B., Zirath, Herbert
core   +2 more sources

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Processes of the Reliability and Degradation Mechanism of High-Power Semiconductor Lasers

Crystals, 2022
High-power semiconductor lasers have attracted widespread attention because of their small size, easy modulation, and high conversion efficiency. They play an important role in national economic construction and national defense construction, including ...
Yue Song, Zhiyong Lv, Jiaming Bai, Shen Niu, Zibo Wu, Li Qin, Yongyi Chen, Lei Liang, Yuxin Lei, Peng Jia, Xiaonan Shan, Lijun Wang   +11 more
doaj   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

Sub-cycle optical control of current in a semiconductor: from the multiphoton to the tunneling regime

, 2016
Nonlinear interactions between ultrashort optical waveforms and solids can be used to induce and steer electric current on a femtosecond (fs) timescale, holding promise for electronic signal processing at PHz frequencies [Nature 493, 70 (2013)].
Barth, Johannes V., Cabrini, Stefano, Ernstorfer, Ralph, Kapser, Stefan, Karpowicz, Nicholas, Kienberger, Reinhard, Kruchinin, Stanislav Yu., Muehlbrandt, Sascha, Paasch-Colberg, Tim, Reichert, Joachim, Sağlam, Özge, Schiffrin, Agustin, Yakovlev, Vladislav S.   +12 more
core   +1 more source

Ultrashort Q-switched pulses from a passively mode-locked distributed Bragg reflector semiconductor laser [PDF]

, 2012
A compact semiconductor mode-locked laser (MLL) is presented that demonstrates strong passive Q-switched mode-locking over a wide range of drive conditions.
Cheung, Flynn, G. Mezösi, Heck, Huttl, Lu, Marc Sorel, Marco Zanola, Michael J. Strain, Stolarz, Strain, Thompson, Thompson   +12 more
core   +1 more source