Results 41 to 50 of about 2,791 (216)

Supercritical Angle Fluorescence and Raman Techniques in Biophotonics

Laser &Photonics Reviews, EarlyView.
Supercritical angle fluorescence (SAF) microscopy and supercritical angle Raman (SAR) spectroscopy have emerged as powerful tools in the field of biophotonics, enabling high‐resolution imaging and spectroscopy of biological specimens near interfaces. This review article provides a comprehensive overview of the principles, techniques, applications, and ...
Subir Das, Nathalia Simea Münch, Stefan Seeger   +2 more
wiley   +1 more source

A Near-Infrared Enhanced Field-Line Crowding Based CMOS-Integrated Avalanche Photodiode

IEEE Photonics Journal, 2023
This paper presents a CMOS-integrated linear-mode avalanche photodiode based on electric field-line crowding (EFLC-APD) to form an effective multiplication zone and a wide absorption zone. The EFLC-APD possesses a hemispherical avalanching electric field
Seyed Saman Kohneh Poushi, Christoph Gasser, Bernhard Goll, Michael Hofbauer, Kerstin Schneider-Hornstein, Horst Zimmermann   +5 more
doaj   +1 more source

Liquid jet capabilities for ultrafast chemistry at the SwissFEL Alvra instrument

Journal of Synchrotron Radiation, EarlyView.
The technical aspects of the Alvra endstation are outlined and its scientific capabilities are demonstrated with commissioning results obtained during the early years of SwissFEL's operation.The Alvra experimental station at the Swiss X‐ray free‐electron laser, SwissFEL, investigates ultrafast dynamics in chemical and biological systems using X‐ray ...
Claudio Cirelli, Emma Victoria Beale, Florian Dworkowski, Victoria Kabanova, Sven Augustin, Gregor Knopp, Chris Milne, Christoph Bostedt, Philip J. M. Johnson, Camila Bacellar   +9 more
wiley   +1 more source

A MATLAB-Based Simulation of Quantum Key Distribution Protocols at Telecom Wavelengths Under Various Realistic Conditions

Photonics
We investigate the feasibility of single and entangled photon-based quantum key distribution protocols at telecommunication wavelengths with two types of single photon detectors, namely InGaAs/InP and Silicon-APD, under various realistic conditions.
Vishal Sharma
doaj   +1 more source

Multi‐LiDAR Observations of Coastal Atmospheric Duct Evolution in Hampton Roads

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 12, 28 June 2026.
Abstract To better understand the influence of atmospheric ducts on radio frequency (RF) operations, continuous high‐resolution observations of temperature and water vapor are essential. Hampton University's (HU) 48‐inch Raman‐Mie LiDAR provides such measurements through rotational and vibrational Raman techniques, enabling detailed monitoring of ...
Jia Su, Melvin A. Felton Jr., Ruben Delgado, David A. Ligon, Deryk James   +4 more
wiley   +1 more source

Design and characterisation of InGaAs high speed photodiodes, InGaAs/InAlAs avalanche photodiodes and novel AlAsSb based avalanche photodiodes [PDF]

, 2012
Avalanche photodiodes (APDs) can provide higher sensitivity, when the noise is dominated by electronic noise, than conventional p-i-n photodiodes due to its internal gain achieved via the impact ionisation process.
Xie, Shiyu
core  

Characteristics of an avalanche photodiode with a spherical contact surface

, 1997
The work presents an analysis of an avalanche photodiode (APD) with a spherical contact surface. We calculated the dependence of the avalanche multiplication and noise parameters on the incident light wavelength.
Smiljanić, Miloljub, Nesic, D, Nešić, Dušan   +2 more
core   +1 more source

Integrated Encapsulation and Implementation of a Linear-Mode APD Detector for Single-Pixel Imaging Lidar

Photonics, 2023
Single-pixel imaging lidar is a novel technology that leverages single-pixel detectors without spatial resolution and spatial light modulators to capture images by reconstruction. This technique has potential imaging capability in non-visible wavelengths
Akang Lv, Kee Yuan, Jian Huang, Dongfeng Shi, Shiguo Zhang, Yafeng Chen, Zixin He   +6 more
doaj   +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

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