Results 41 to 50 of about 962 (171)

Area-dependent gain and noise characteristics of mid-wavelength infrared HgCdTe planar electron avalanche photodiodes

Materials Research Express, 2022
This paper mainly investigates the area-dependent gain and noise characteristics of mid-wavelength infrared (MWIR) Hg _0.7 Cd _0.3 Te planarelectron avalanche photodiodes (e-APDs) operated at 80 K.
Dan Yang, Huijun Guo, Liqi Zhu, Liao Yang, Lu Chen, Chun Lin, Ruijun Ding, Li He   +7 more
doaj   +1 more source

4H-SiC Ultraviolet Avalanche Photodiodes With Small Gain Slope and Enhanced Fill Factor

IEEE Photonics Journal, 2017
In this paper, 4H-SiC separated absorption charge and multiplication ultraviolet avalanche photodiodes (APDs) with small gain-voltage slope and enhanced fill factor are designed and fabricated.
Sen Yang, Dong Zhou, Weizong Xu, Xiaolong Cai, Hai Lu, Dunjun Chen, Fangfang Ren, Rong Zhang, Youdou Zheng   +8 more
doaj   +1 more source

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

Sb-Based Low-Noise Avalanche Photodiodes

Photonics, 2023
Accurate detection of weak optical signals is a key function for a wide range of applications. A key performance parameter is the receiver signal-to-noise ratio, which depends on the noise of the photodetector and the following electrical circuitry.
Joe C. Campbell, John P. R. David, Seth R. Bank   +2 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

Low Noise Short Wavelength Infrared Avalanche Photodetector Using SB-Based Strained Layer Superlattice

Photonics, 2021
We demonstrate low noise short wavelength infrared (SWIR) Sb-based type II superlattice (T2SL) avalanche photodiodes (APDs). The SWIR GaSb/(AlAsSb/GaSb) APD structure was designed based on impact ionization engineering and grown by molecular beam epitaxy
Arash Dehzangi, Jiakai Li, Manijeh Razeghi   +2 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

Low Junction Capacitance PIN and Avalanche Photodiodes in 180 nm CMOS

IEEE Access
This paper presents a comprehensive study of low-capacitance PIN photodiodes and avalanche photodiodes (APDs) implemented in 180 nm CMOS.
Christoph Gasser, Seyed Saman Kohneh Poushi, Simon Michael Laube, Kerstin Schneider-Hornstein, Horst Zimmermann   +4 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

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, Volume 36, Issue 42, 26 May 2026.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source