Results 61 to 70 of about 2,791 (216)

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

Extremely Low Noise GaAsSb/AlGaAsSb Avalanche Photodiode for Infrared Detection

, 2023
This work demonstrated the characterisation for Separate Absorption and Multiplication Avalanche Photodiode (SAM-APD) incorporating a GaAsSb absorption region and an AlGaAsSb multiplication region.
Cao, Ye
core  

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

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

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

Low-noise avalanche photodiode in standard 0.35-um CMOS technology

, 2008
In this paper, we report on an Avalanche Photodiode (APD) fabricated in a standard 0.35-μm CMOS technology. The main electrooptical characteristics of the device are presented, showing a remarkably low-noise factor if compared to other CMOS APDs.
Pancheri, Lucio, Dalla Betta, Gian Franco, Scandiuzzo, Mauro, Stoppa, David   +3 more
core   +1 more source

Quantum‐Grade Nanodiamonds from a Single‐Step, Industrial‐Scale Pressure and Temperature Process

Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.
Novel method for creation of nitrogen‐vacancy centers in 50‐nm nanodiamonds based on high‐temperature plastic deformation is demonstrated. Compared to the electron irradiation approach, it yields nitrogen‐vacancy centers with significantly improved charge stability, T1 relaxation time, and optical Rabi contrast.
Yahua Bao, Michal Gulka, Parkarsh Kumar, Jakub Copak, Priyadharshini Balasubramanian, Yuliya Mindarava, Rémi Blinder, Michael Olney‐Fraser, Haotian Wen, Hana Spanielova, Helen Zhi Jie Zeng, Benjamin Whitefield, Igor Aharonovich, Jaroslav Hruby, Fedor Jelezko, J. Daniel Belnap, Shery L. Y. Chang, Petr Cigler   +17 more
wiley   +1 more source

Enhanced probability density function using APD in SAC-OCDMA systems based SPD technique [PDF]

, 2013
This paper examines the avalanche photodiode (APD) gain impact on spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems based single photodiode detection (SPD) technique.
Angela Amphawan, Fadhil, Hilal A., S. A. Aljunid, Al-Khafaji, Hamza M. R., Amphawan, Angela, Hamza M. R. Al-Khafaji, Aljunid, S. A., Hilal A. Fadhil   +7 more
core   +1 more source

Unified Pulsed Laser Range Finder and Velocimeter using Ultra-Fast Time-To-Digital Converter

Iranian Journal of Electrical and Electronic Engineering, 2009
In this paper, we present a high accuracy laser range finder and velocimeter using ultra-fast time-to-digital converter (TDC). The system operation is based on the measuring the round-trip time of a narrow laser pulse.
Shahram Mohammad Nejad, Saeed Olyaee
doaj