Results 71 to 80 of about 1,437,467 (197)

Pion Detection Using Single Photon Avalanche Diodes

Sensors, 2023
We present the first reported use of a CMOS-compatible single photon avalanche diode (SPAD) array for the detection of high-energy charged particles, specifically pions, using the Super Proton Synchrotron at CERN, the European Organization for Nuclear ...
Anthony Frederick Bulling, Ian Underwood
doaj   +1 more source

Ratiometric Mycotoxin Detection in Living Plants With Dual‐Emissive Nanosensors

Advanced Materials, Volume 38, Issue 47, 21 August 2026.
A minimally invasive microneedle patch integrates carbon dot‐embedded metal–organic frameworks as nanosensors to detect a key fungal toxin in living plants. The nanosensor produces a ratiometric fluorescence signal that enables early, non‐destructive diagnosis of fungal infection before visible symptoms, offering a new biomaterials‐based strategy for ...
Yuliang Li, Di Shen, Ziyang Huang, Suppanat Puangpathumanond, Calvin Thenarianto, Yue Zhao, Jolly Madathiparambil Saju, Rajani Sarojam, Dongmei Zhou, Tedrick Thomas Salim Lew   +9 more
wiley   +1 more source

Compact CMOS active quenching/recharge circuit for SPAD arrays [PDF]

International Journal of Circuit Theory and Applications, 2015
SummaryAvalanche diodes operating in Geiger mode are able to detect single photon events. They can be employed to photon counting and time‐of‐flight estimation. In order to ensure proper operation of these devices, the avalanche current must be rapidly quenched, and, later on, the initial equilibrium must be restored.
Ion Vornicu, Ricardo Carmona-Galán, Belén Pérez-Verdú, Ángel Rodríguez-Vázquez   +3 more
openaire   +4 more sources

On Pulsed Time-of-Flight Laser Ranging With Sub-ns Laser Pulses and an Off–Focal Plane Digital CMOS SPAD Receiver

IEEE Photonics Journal
Pulsed time-of-flight lidar techniques based on the use of a gain-switched laser diode as a transmitter and a digital CMOS SPAD array with 9 × 9 SPAD unit elements and 10 time-to-digital converters are presented.
Juha Kostamovaara, Sahba Jahromi, Jaakko Huikari   +2 more
doaj   +1 more source

Smart Sensing Systems For Agricultural Plant Health Monitoring: Current State and Prospects

Advanced Sensor Research, Volume 5, Issue 8, August 2026.
Smart plant sensing technologies are critically evaluated across contact and non‐contact modalities, fabrication strategies, and diagnostic capabilities. Key deployment challenges and future research directions are identified, revealing pathways toward scalable, field‐ready systems that enable reliable, real‐time plant health monitoring and accelerate ...
Frank Efe Erukainure, Abhilash K. Chandel   +1 more
wiley   +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

Quantum-enhanced imaging with SPAD array cameras

, 2023
(English) Entangled photon pairs can enhance optical imaging capabilities. Phase imaging allows detecting fine detail of transparent samples without potentially invasive fluorescent labelling, and here entanglement enables a higher signal-to-noise ratio (SNR) than possible with only classical light. Spatial correlations from spontaneous parametric down
openaire   +3 more sources

Advances in Position‐Momentum Entanglement: A Versatile Tool for Quantum Technologies

Laser &Photonics Reviews, Volume 20, Issue 15, 7 August 2026.
Position–momentum entanglement constitutes a high‐dimensional continuous‐variable resource in quantum optics. Recent advances in its generation, characterization, and control are reviewed, with emphasis on spontaneous parametric down‐conversion and modern measurement techniques.
Satyajeet Patil, Rajshree Swarnkar, Jonas L. Moos, Sebastian Töpfer, Sergio Tovar‐Pérez, Jorge Fuenzalida, Markus Gräfe   +6 more
wiley   +1 more source

Reconfiguring biofortification strategies to transform food systems and address micronutrient deficiency of the 21st century

Journal of Integrative Plant Biology, Volume 68, Issue 8, Page 2511-2547, August 2026.
This review explores how to make staple foods and horticultural crops more nutritious, including how artificial intelligence‐based screening of gene banks helps deploy nutritionally rich germplasm into breeding. Genome editing can help develop crops richer in minerals, vitamins, and health‐promoting compounds, supporting healthier diets and more ...
Rhowell Jr. N. Tiozon, Alisdair R. Fernie, Nese Sreenivasulu   +2 more
wiley   +1 more source

1.8-µm pitch, 47-ps jitter SPAD array in a 130 nm SiGe BiCMOS process.

Optics Express
We introduce the world's first SPAD family design in 130 nm SiGe BiCMOS process. At 1.8 µm, we achieved the smallest pitch on record thanks to guard-ring sharing techniques, while keeping a relatively high fill factor of 24.2%.
Feng Liu, E. Charbon
semanticscholar   +1 more source