Results 71 to 80 of about 5,513 (216)

Avalanche Multiplication and Excess Noise in InAs Electron Avalanche Photodiodes at 77 K

, 2011
The findings of a study of impact ionization, avalanche multiplication and excess noise in InAs avalanche photodiodes at 77 K are reported. It is shown that hole impact ionization is negligible in practical devices which continue to operate as electron ...
Andrew Robert Julian Marshall, David, John P. R., Marshall, Andrew Robert Julian, Tan, Chee Hing, Pin Jern Ker, Vines, Peter, Ker, Pin Jern, John P. R. David, Peter Vines, Chee Hing Tan   +9 more
core   +1 more source

Temperature effects on characteristics and performance of near-infrared wide bandwidth for different avalanche photodiodes structures

Results in Physics, 2019
In this paper, the influences of thermal and spectral variations on various structures of avalanche photodiodes (APDs) have been deeply investigated. The characteristics and performance of Silicon (Si), Gallium Arsenide (GaAs) and Indium Gallium Arsenide
I.S. Amiri, Fatma Mohammed Aref Mahmoud Houssien, Ahmed Nabih Zaki Rashed, Abd El-Naser A. Mohammed   +3 more
doaj   +1 more source

High-performance HgCdTe avalanche photodetector enabled with suppression of band-to-band tunneling effect in mid-wavelength infrared

npj Quantum Materials, 2021
HgCdTe avalanche photodiodes promise various fascinating applications due to the outstanding capability of detecting weak signals or even single photon. However, the underlying transport mechanisms of diverse dark current components are still unresolved ...
Jin Chen, Jian Chen, Xin Li, Jiale He, Liao Yang, Jian Wang, Feilong Yu, Zengyue Zhao, Chuan Shen, Huijun Guo, Guanhai Li, Xiaoshuang Chen, Wei Lu   +12 more
doaj   +1 more source

Disordered Carbon Shells Enable Shape Dependent Fluorescence Enhancement in Nanodiamond Quantum Sensors Revealed by Correlative TEM–Fluorescence Microscopy

Advanced Functional Materials, Volume 36, Issue 45, 5 June 2026.
Molten KNO2 treatment induces a lowrefractive index disordered carbon shell on fluorescent nanodiamonds, enhancing fluorescence emission while preserving spin coherence. Machine learningassisted correlative TEMPL enables direct single‐particle resolution of this enhancement relative to air‐oxidized nanodiamonds of similar morphology, establishing a ...
Parkarsh Kumar, Tom Vaillant, Mehran Kianinia, Haotian Wen, Adam Stewart, Peter J. Reece, Hugues A. Girard, Jean‐Charles Arnault, Huan‐Cheng Chang, Igor Aharonovich, Shery L. Y. Chang   +10 more
wiley   +1 more source

SiC avalanche photodiode array with microlenses

Optics Express, 2010
A simple technique to incorporate microlenes with small photodiode arrays is demonstrated and analyzed. Using this method, the fill factor was increased from 2.6% to 22.4% for a two by two array. Simulation results are also shown. The photocurrent with microlens was approximately 8.6 times larger than without the microlens, which is consistent with ...
Kejia, Li, Han-Din, Liu, Qiugui, Zhou, Dion, McIntosh, Joe C, Campbell   +4 more
openaire   +2 more sources

Self‐Sustained Oscillations in MoS2 Optomechanical Resonators for VHF Optical Radio

Advanced Photonics Research, Volume 7, Issue 6, June 2026.
This work demonstrates the use of 2D materials drum resonators to generate and modulate radio‐over‐laser signals. Taking advantage of the self‐sustained oscillations arising in cavity optomechanical systems by a continuous wave visible laser, a radio frequency signal is generated and frequency‐modulated by just changing a DC gate voltage.
Ramón Bernardo‐Gavito, Julia García‐Pérez, Ruth Martínez Temple, Daniel Granados   +3 more
wiley   +1 more source

Engineering Stealth Properties of Fluorescent Polymeric Nanoparticles by Short‐Chain Polysarcosine

Aggregate, Volume 7, Issue 6, June 2026.
To define the minimal polysarcosine chain length required for nanoparticle stealth properties, we engineered dye‐loaded polymeric nanoparticles functionalized with 5‐, 11‐, or 19‐mer peptoids. Only nanoparticles with 19‐mer polysarcosine achieved near‐neutral zeta potential, suppressed nonspecific interactions with glass surface and live cells ...
Tanushree Gupta, Quynh Anh Bui, Horgan Manirakiza, Lina El Hajji, Remi Pelletier, Nicolas Humbert, Abdel Wahab Mouhamad, Andreas Reisch, Arnaud Gautier, Andrey S. Klymchenko   +9 more
wiley   +1 more source

Simulation of neutron radiation effects in silicon avalanche photodiodes

, 2000
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A new one-dimensional device simulation package developed for the simulation of neutron radiatiol!
Osborne, M.D., Osborne, Mark David
core  

Performance Modulation for Back-Illuminated AlGaN Ultraviolet Avalanche Photodiodes Based on Multiplication Scaling

IEEE Photonics Journal, 2019
Back-illuminated Al0.1Ga0.9N ultraviolet avalanche photodiodes (APDs) of various multiplication widths were fabricated on AlN templates with a separate absorption and multiplication structure.
Qing Cai, Qian Li, Mo Li, Yin Tang, Jin Wang, Junjun Xue, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng   +9 more
doaj   +1 more source

Evaluating Variability in Extracellular Vesicle Characterization Across Measurement Techniques

Journal of Extracellular Biology, Volume 5, Issue 6, June 2026.
ABSTRACT Reliable, reproducible, and standardized characterization of extracellular vesicles (EVs) remains a central challenge due to methodological variability across analytical platforms and intrinsic EV heterogeneity within and across biofluids. Here, we evaluated EVs isolated using ultracentrifugation from dedifferentiated liposarcoma‐conditioned ...
Premanshu K. Singh, Ali F. Usmani, Debmalya Halder, Jenna Miller, Tharune Kanagasabai, Patricia Sarchet, Kevin Weller, George J. Klarmann, Raphael E. Pollock, Federica Calore, Shaurya Prakash   +10 more
wiley   +1 more source