Results 51 to 60 of about 5,264,207 (202)

Switchable Dual Emission of Luminescent Metal–Organic Framework@Nanoparticle Composites of EuBDC and ZrO‐Containing Hybrid Materials

European Journal of Inorganic Chemistry, Volume 29, Issue 26, 16 September 2026.
Luminescent metal–organic framework@nanoparticle composites show dual emission of both components EuBDC and zirconyl‐containing nanoparticles, being reversible, excitation energy‐dependent and solvatochromic switches. The chromaticity changes are fast, as no chemical transformation is involved and required as source of the dual emission.
Tobias Wehner, Joachim G. Heck, Claus Feldmann, Klaus Müller‐Buschbaum   +3 more
wiley   +1 more source

Implementable methods for characterizing single photon avalanche diode parameters

Results in Optics
Single photon avalanche diode (SPAD) is used in quantum detectors. Quantum detectors are widely used in quantum communication. The quality of these detectors strongly affects the optimal performance of the system.
Mahdi Rahmanpour, Alireza Erfanian, Ahmad Afifi, Mahdi Khaje, Mohammad Hossein Fahimifar   +4 more
doaj   +1 more source

Quantitative Cherenkov‐excited fluorescence emission dosimetry for HDR Co‐60 brachytherapy: Calibration and planar validation against TPS

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background Accurate dose verification in High‐Dose‐Rate (HDR) brachytherapy presents a significant challenge due to steep dose gradients and the absence of beam collimation. Conventional quality assurance (QA) methods typically rely on point detectors or film‐based techniques, which lack the capability to provide real‐time, full‐field ...
Yagiz Yedekci, Mehmet Fazıl Enkavi, Ferah Yildiz   +2 more
wiley   +1 more source

Real‐Time Monitoring of Paramagnetic Reactions Using Spin Relaxometry with Fluorescent Nanodiamonds

Advanced Quantum Technologies, Volume 9, Issue 9, September 2026.
Real‐time T1 spin relaxometry of fluorescent nanodiamond ensembles enables rapid, low‐cost monitoring of paramagnetic chemical reactions. An optimized cuvette‐based platform combining an avalanche photodiode and FPGA data acquisition tracks Cu(II) reduction to Cu(I) with 15‐second time resolution, achieving over 100‐fold speed improvement and tenfold ...
Trent Ralph, Erin S. Grant, Lianne Lay, Sepehr Ahmadi, David A. Simpson   +4 more
wiley   +1 more source

A time-correlated single photon counting SPAD array camera with a bespoke data-processing algorithm for lightsheet fluorescence lifetime imaging (FLIM) and FLIM videos

Scientific Reports
A wide-field microscope with epi-fluorescence and selective plane illumination was combined with a single-photon avalanche diode (SPAD) array camera to enable live-cell fluorescence lifetime imaging (FLIM) using time-correlated single-photon counting ...
Jakub Nedbal, Francesco Mattioli Della Rocca, Iveta T. Ivanova, Andrew Allan, Jeremy Graham, Richard Walker, Robert K. Henderson, Klaus Suhling   +7 more
doaj   +1 more source

Synchronous Clock Recovery of Photon-Counting Underwater Optical Wireless Communication Based on Deep Learning

Photonics, 2022
In photon-counting underwater optical wireless communication (UOWC), the recovery of the time slot synchronous clock is extremely important, and it is the basis of symbol synchronization and frame synchronization.
Haodong Yang, Qiurong Yan, Ming Wang, Yuhao Wang, Peng Li, Wei Wang   +5 more
doaj   +1 more source

Rotating Fluorescent Nanodiamond Assemblies With Focused Laguerre–Gaussian Beams

Advanced Optical Materials, Volume 14, Issue 31, August 21, 2026.
Self‐assembled fluorescent nanodiamond clusters are optically trapped and driven into controlled two‐dimensional rotation with Laguerre–Gaussian beams. With localized optical excitation, optically detected magnetic resonance spectra are collected at defined points along the orbit in a uniform external magnetic field.
Adam Stewart, Anthony J. El‐Helou, Ying Zhu, David McGloin, David A. Simpson, Peter J. Reece   +5 more
wiley   +1 more source

Optical Wireless Communication with SPAD Receivers

, 2020
Single-photon avalanche diode based receivers will be described. Their results in optical wireless communication (OWC) experiments will be shown. Furthermore, the influence of the incidence angle of the signal light on the BER will be investigated for ...
Mahmoudi, Hiwa, Goll, Bernhard, Zimmermann, Horst, Schneider-Hornstein, Kerstin, Hofbauer, Michael   +4 more
core   +4 more sources

Superconducting nanowire single-photon detectors: physics and applications [PDF]

, 2012
Single-photon detectors based on superconducting nanowires (SSPDs or SNSPDs) have rapidly emerged as a highly promising photon-counting technology for infrared wavelengths.
Hadfield, Robert H, Natarajan, C.M., Natarajan, Chandra M, Tanner, M.G., Hadfield, R., Tanner, Michael Geoffrey; id_orcid   +5 more
core   +1 more source

Supercritical Angle Fluorescence and Raman Techniques in Biophotonics

Laser &Photonics Reviews, Volume 20, Issue 15, 7 August 2026.
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