Results 31 to 40 of about 2,951 (180)
Single Photon Counting UV Solar-Blind Detectors Using Silicon and III-Nitride Materials
Sensors, 2016 Ultraviolet (UV) studies in astronomy, cosmology, planetary studies, biological and medical applications often require precision detection of faint objects and in many cases require photon-counting detection.
Shouleh Nikzad +14 more
doaj +1 more source
Inverted p-down Design for High-Speed Photodetectors
Photonics, 2021 We discuss the structural consideration of high-speed photodetectors used for optical communications, focusing on vertical illumination photodetectors suitable for device fabrication and optical coupling.
Masahiro Nada +8 more
doaj +1 more source
Single photon avalanche detectors: prospects of new quenching and gain mechanisms
Nanophotonics, 2015 While silicon single-photon avalanche diodes (SPAD) have reached very high detection efficiency and timing resolution, their use in fibre-optic communications, optical free space communications, and infrared sensing and imaging remains ...
Hall David, Liu Yu-Hsin, Lo Yu-Hwa
doaj +1 more source
Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry
Advanced Functional Materials, EarlyView.A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming +4 more
wiley +1 more source
MCT APD Detection System for Atmospheric Profiling Applications Using Two-Micron Lidar [PDF]
EPJ Web of Conferences, 2020 An advanced detection system, based on mercury cadmium telluride avalanche photodiodes array, was implemented within a 2-μm lidar. Detection system characterization was conducted for performance evaluation including settling time, noise-equivalent-power (
Refaat Tamer F. +3 more
doaj +1 more source
Nanodiamond Sensing in Dynamic Environments With Fast‐Tracking Through Four‐Point Positioning
Advanced Functional Materials, EarlyView.A four‐point positioning tracking (4PPT) platform enables fast 3D feedback translational tracking of fluorescent nanodiamonds while simultaneously recording ODMR spectra. By integrating real‐time translational tracking with quantum sensing, mobile nanodiamonds are used for in‐situ nanothermometry, nanorheometry, and 6D translation–rotation tracking in ...
Guoli Zhu +10 more
wiley +1 more source
Trap-assisted tunneling in AlGaN avalanche photodiodes
AIP Advances, 2017 We fabricated AlGaN solar-blind avalanche photodiodes (APDs) that were based on separate absorption and multiplication (SAM) structures. It was determined experimentally that the dark current in these APDs is rapidly enhanced when the applied voltage ...
Z. G. Shao +9 more
doaj +1 more source
Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application
Advanced Materials, EarlyView.This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong +12 more
wiley +1 more source
Advanced Materials, EarlyView.This work investigates the heterogeneous nucleation of CsPbBr3${\rm CsPbBr}_3$ nanocrystal superlattices along the faces of 2D PEA2PbBr4${\rm PEA}_2{\rm PbBr}_4$ layered perovskite microcrystals. Core–crown and core–shell heterostructure morphologies are obtained.
Umberto Filippi +6 more
wiley +1 more source
InGaAs Communication Photodiodes: From Low- to High-Power-Level Designs
IEEE Photonics Journal, 2010 While InGaAs absorption material has been used for various applications up to 1.6-μm wavelength, specific designs for low-level detection have become of main interest using high responsivity and low-dark-current detectors.
M. Achouche +5 more
doaj +1 more source