Results 71 to 80 of about 815,097 (318)

Photonic Generation of Wideband Chirped Microwave Waveforms

IEEE Journal of Microwaves, 2021
A chirped microwave waveform with a large time-bandwidth product (TBWP) can find important applications in modern radar systems and microwave imaging systems. Microwave photonics, a field that studies the generation and processing of microwave signals in
Hao Chi, Chao Wang, Jianping Yao
doaj   +1 more source

Improved performance of a hybrid radio/fiber system using a directly modulated laser transmitter with external injection [PDF]

, 2002
A directly modulated laser diode with external light injection is used to generate microwave optical signals for a hybrid radio/fiber system. The external light injection greatly enhances the frequency response of the laser, and thus, significantly ...
Anandarajah, Prince M., Barry, Liam P., Kaszubowska-Anandarajah, Aleksandra   +2 more
core   +1 more source

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

Advanced Materials Interfaces, EarlyView.
Microwave absorption can detect Dirac fermions in samples exposed to the atmosphere. Results showed that although topological surface states are robust against environmental degradation, they are not detectable by electrical transport measurements. Hence, microwave absorption can detect Dirac fermions even in samples whose surfaces have deteriorated ...
Wellington P. do Prado, Jorge A. Navarro‐Giraldo, Muhammad Tahsin, Vinicius T. Santana, Eduardo Abramof, Paulo H. O. Rappl, Suelen de Castro, Marcelos L. Peres, Petr Neugebauer   +8 more
wiley   +1 more source

Low-error and broadband microwave frequency measurement in a silicon chip

, 2015
Instantaneous frequency measurement (IFM) of microwave signals is a fundamental functionality for applications ranging from electronic warfare to biomedical technology.
Aalto, Timo, Casas-Bedoya, Alvaro, Eggleton, Benjamin J., Harjanne, Mikko, Kapulainen, Markku, Marpaung, David, Morrison, Blair, Pagani, Mattia, Zhang, Yanbing   +8 more
core   +1 more source

Exploring the Potential of Microwave Annealing for Enhancing Si‐based GeSn Lasers

Advanced Materials Technologies, EarlyView.
We explore low‐thermal‐budget microwave annealing to enhance the performance of group‐IV GeSn lasers on Si. Microwave annealing under optimal conditions can simultaneously relax unwanted compressive strain and enhance the material quality of the GeSn active layer, thereby reducing the threshold and increasing the laser operating temperature.
Yue‐Tong Jheng, Cheng‐Feng Liu, Ruei‐Jhang Wang, Yu Cheng, Lung‐Yi Hsu, Yonder Berencén, Shengqiang Zhou, Hanh Thi‐Thu Tran, Guo‐En Chang   +8 more
wiley   +1 more source

The Method of Low-Temperature ICP Etching of InP/InGaAsP Heterostructures in Cl₂-Based Plasma for Integrated Optics Applications

Micromachines, 2021
Chlorine processes are widely used for the formation of waveguide structures in InP-based optoelectronics. Traditionally, ICP etching of InP in a Cl2-based plasma requires substrate temperatures in the range of 150–200 °C.
Sergey Ishutkin, Vadim Arykov, Igor Yunusov, Mikhail Stepanenko, Vyacheslav Smirnov, Pavel Troyan, Yury Zhidik   +6 more
doaj   +1 more source

Microwave photonics frequency-to-time mapping based on a Fourier domain mode locked optoelectronic oscillator.

Optics Express, 2018
An approach to microwave photonics frequency-to-time mapping (MWP FTM) is proposed based on a Fourier domain mode locked optoelectronic oscillator (FDML OEO).
T. Hao, Jian Tang, Wei Li, N. Zhu, Ming Li   +4 more
semanticscholar   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Design and Optimization of Highly Miniaturized Liquid Crystal Phase Shifters Based on Defected Ground Structures

IEEE Journal of Microwaves
This paper presents a fast and compact design method for planar liquid crystal (LC) phase shifters, using circuit models based on filter design principles.
Robin Neuder, Marc Spath, Martin Schubler, Alejandro Jimenez-Saez   +3 more
doaj   +1 more source

Characterization of Power-to-Phase Conversion in High-Speed P-I-N Photodiodes

, 2011
Fluctuations of the optical power incident on a photodiode can be converted into phase fluctuations of the resulting electronic signal due to nonlinear saturation in the semiconductor.
Datta, S., Diddams, S., Hati, A., Joshi, A., Nelson, C., Quinlan, F., Taylor, J.   +6 more
core   +1 more source