Results 61 to 70 of about 1,282 (172)

Coincident Fluorescence‐Burst Analysis of Actin Cargo Molecules in Secreted Single Diffusing Extracellular Vesicles From Human Induced Pluripotent Stem Cells

open access: yesAdvanced Science, Volume 13, Issue 13, 3 March 2026.
This study presents a two‐color FCCS and coincident‐burst analysis platform to quantify actin cargo in dual‐labeled EVs secreted from hiPSCs. The approach tracks secretion dynamics, confirms actin loading, and measures EV size and cargo number, offering insights into cytoskeletal disruption and neuronal differentiation relevant to neurodegenerative ...
Dang Du Nguyen   +4 more
wiley   +1 more source

High‐Precision Measurement of Time Delay with Frequency‐Resolved Hong‐Ou‐Mandel Interference of Weak Coherent States

open access: yesAdvanced Quantum Technologies, Volume 9, Issue 3, March 2026.
High‐precision time‐delay measurements are demonstrated using frequency‐resolved Hong‐Ou Mandel (HOM) interference with weak coherent states. The method, by exploiting the quantum eraser phenomenon, achieves low uncertainty even for delays exceeding the photon coherence time, where traditional HOM interferometry fails, thus confirming theoretical ...
Francesco Di Lena   +9 more
wiley   +1 more source

s2ISM: A Comprehensive Approach for Uncompromised Super-Resolution and Optical Sectioning in Image Scanning Microscopy [PDF]

open access: yesEPJ Web of Conferences
Image Scanning Microscopy (ISM) enables good signal-to-noise ratio (SNR), super-resolution and high information content imaging by leveraging array detection in a laser-scanning architecture. However, the SNR is still limited by the size of the detector,
Zunino Alessandro   +5 more
doaj   +1 more source

High Dynamic Range Imaging at the Quantum Limit with Single Photon Avalanche Diode-Based Image Sensors

open access: yesSensors, 2018
This paper examines methods to best exploit the High Dynamic Range (HDR) of the single photon avalanche diode (SPAD) in a high fill-factor HDR photon counting pixel that is scalable to megapixel arrays.
Neale A.W. Dutton   +4 more
doaj   +1 more source

A Design and Characterization of CMOS SPAD Fabricated in a 0.18-μm Standard Process

open access: yesIEEE Access
This article presents the design and characterization of a cost-effective single-photon avalanche diode (SPAD) implemented using a standard 180-nm CMOS process without any process modification.
Woojin Jo   +2 more
doaj   +1 more source

SPAD Smart Pixel for Time-of-Flight and Time-Correlated Single-Photon Counting Measurements

open access: yesIEEE Photonics Journal, 2012
We present a smart pixel based on a single-photon avalanche diode (SPAD) for advanced time-of-flight (TOF) and time-correlated single photon counting (TCSPC) applications, fabricated in a cost-effective 0.35- m CMOS technology.
F. Villa   +10 more
doaj   +1 more source

Artifact Removal in Long-Range Single Photon LiDAR via Waveforms-Guided Depth Image Estimation

open access: yesIEEE Photonics Journal
Single-photon light detection and ranging (LiDAR) has widespread applications due to the ultra-high sensitivity of the single-photon detector. However, the reconstruction has been plagued by multiple types of noise caused by crosstalk, dark counts, and ...
Jiying Chang   +7 more
doaj   +1 more source

Single-Photon Computational Imaging System Based on Multi-Pixel Photon Counter

open access: yesPhotonics
Existing single-photon computational imaging systems always combine single-photon avalanche diode (SPAD)/photomultiplier tube (PMT) and time-correlated single-photon counting (TCSPC) together to collect the signals for imaging.
Rui Sun   +7 more
doaj   +1 more source

An Interface Circuit With Gain Automatic Adjustment for SPAD Arrays

open access: yesIEEE Journal of the Electron Devices Society
In this paper, a gain automatic adjustment interface circuit is proposed for the non-uniform breakdown voltage of single-photon avalanche diode (SPAD) arrays caused by process and materials.
Lixia Zheng   +5 more
doaj   +1 more source

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