Results 51 to 60 of about 962 (171)

Recent advances of infrared avalanche photodiodes based on low-noise aluminum (antimony)-contained materials and their journey toward single-photon detection [PDF]

APL Photonics
Single photon avalanche diodes (SPADs) are key enabling technologies for a wide range of applications. In the near-infrared region, In0.53Ga0.47As/InP (InGaAs/InP) SPADs are the primary candidates for practical applications requiring extremely weak light
Yanli Zhao
doaj   +1 more source

Optimization of charge and multiplication layers of 20‐Gbps InGaAs/InAlAs avalanche photodiode

ETRI Journal, 2021
We calculated the correlation between the doping concentration of the charge layer and the multiplication layer for separate absorption, grading, charge, and multiplication InGaAs/InAlAs avalanche photodiodes (APDs).
Jae‐Sik Sim, Kisoo Kim, Minje Song, Sungil Kim, Minhyup Song   +4 more
doaj   +1 more source

Dithered Depth Imaging for Single-Photon Lidar at Kilometer Distances

Remote Sensing, 2022
Depth imaging using single-photon lidar (SPL) is crucial for long-range imaging and target recognition. Subtractive-dithered SPL breaks through the range limitation of the coarse timing resolution of the detector.
Jiying Chang, Jining Li, Kai Chen, Shuai Liu, Yuye Wang, Kai Zhong, Degang Xu, Jianquan Yao   +7 more
doaj   +1 more source

Single‐Molecule Forster Resonance Energy Transfer With a Minimalistic 3D‐Printed Setup and Dyes in the Blue‐Green Spectral Region

ChemPhysChem, Volume 27, Issue 8, 28 April 2026.
Single‐molecule FRET enables nanometer‐scale insights into biomolecular structure and dynamics but often requires complex instrumentation. We present the FRET‐Brick, a minimalistic, 3D‐printed microspectroscopy platform using 488 nm continuous‐wave excitation and PMT detection.
Gabriel G. Moya Muñoz, Jorge R. Luna Piedra, Pazit Con, Mostofa Ataur Rohman, Siyu Lu, Thomas‐Otavio Peulen, Thorben Cordes   +6 more
wiley   +1 more source

Experimental Demonstration of the Impact of the Parameters of Floating Guard Ring on Planar InP/InGaAs-Based Avalanche Photodiodes’ Performance and Its Optimization

IEEE Photonics Journal, 2022
Suppression pre-breakdown in planar separated absorption, grading, charge and multiplication (SAGCM) avalanche photodiodes (APDs) with the help of Floating Guard Ring (FGR) is still a research hotspot.
Junyang Zhang, Xuanzhang Li, Chunhua Du, Yang Jiang, Ziguang Ma, Hong Chen, Haiqiang Jia, Wenxin Wang, Zhen Deng   +8 more
doaj   +1 more source

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

Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
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

Sensitivity Improvement of 2.5 Gb/s Receivers Using AlGaAsSb Avalanche Photodiodes

Applied Sciences
At a 1550 nm wavelength, the optical sensitivity of conventional indium gallium arsenide (InGaAs)-based avalanche photodiodes (APDs) is restricted by their high excess noise, hindering their performance in long-range free-space optical communication ...
Jonty Veitch, Ding Chen, Jonathan Petticrew, Jo Shien Ng, Chee Hing Tan   +4 more
doaj   +1 more source

Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen

Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann, Christoph Findler, Michael Olney‐Fraser, Lev Kazak, Fedor Jelezko   +4 more
wiley   +1 more source

Fine Control of the Electric Field Distribution in the Heterostructure Multiplication Region of AlGaN Avalanche Photodiodes

IEEE Photonics Journal, 2017
To enhance avalanche ionization, we designed a new separate absorption and multiplication AlGaN solar-blind avalanche photodiode (APD) by replacing the conventional AlGaN homogeneous multiplication region with a high/low Al content AlGaN ...
Haifan You, Zhenguang Shao, Yiran Wang, Liqun Hu, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng   +7 more
doaj   +1 more source

Enhancement of Modulation Bandwidth for VLC Utilizing Green Mini‐LED Light Source

Advanced Physics Research, Volume 5, Issue 3, March 2026.
This paper investigates three sizes of green Mini‐LEDs for visible light communication, focusing on modulation bandwidth and the impact of atomic layer deposition (ALD) sidewall passivation. ALD significantly enhances bandwidth (up to 21.6%), confirming suppression of nonradiative recombination.
Rongxing Wu, Yuhan Su, Yurong Dai, Chenghao Wang, Lianfen Huang, Huaxin Liu, Jincheng Xu, Hao‐Chung Kuo, Zhong Chen, Tingzhu Wu   +9 more
wiley   +1 more source