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Fluorescence microscopy and derived techniques are continuously looking for photodetectors able to guarantee increased sensitivity, high spatial and temporal resolution and ease of integration into modern microscopy architectures. Recent…

Single photon avalanche diode (SPAD) arrays have proven themselves as serious candidates for time of flight positron emission tomography (PET). Discrete readout schemes mitigate the low-noise requirements of analog schemes and offer very…

Instrumentation and Detectors · Physics 2018-06-28 M. -A. Tétrault , É. Desaulniers Lamy , A. Boisvert , C. Thibaudeau , F. Dubois , R. Fontaine , J. -F. Pratte

SPAD cameras offer single photon detection sensitivity, high frame rates and zero readout noise. They are a core technology for widefield FLIM, but have further potential in ultra-fast imaging applications. However, in practice sensitivity…

Instrumentation and Detectors · Physics 2016-02-15 Istvan Gyongy , Amy Davies , Neale A. W. Dutton , Rory Duncan , Colin Rickman , Robert K. Henderson , Paul Dalgarno

A single-photon avalanche detector (SPAD) for high-speed quantum-key generation has successfully been developed. It has the highest photon detection repetition frequency and the lowest dark count rate in the world, as a board-mountable…

Quantum Physics · Physics 2007-12-28 Seigo Takahashi , Akio Tajima , Akihisa Tomita

Massively parallel annealing processors may offer superior performance for a wide range of sampling and optimization problems. A key component dictating the size of these processors is the neuron update circuit, ideally implemented using…

Emerging Technologies · Computer Science 2023-11-15 William Whitehead , Zachary Nelson , Kerem Y. Camsari , Luke Theogarajan

Single Photon Avalanche Diodes (SPADs) represent a cutting-edge imaging technology, capable of detecting individual photons with remarkable timing precision. Building on this sensitivity, Single Photon Cameras (SPCs) enable image capture at…

Image and Video Processing · Electrical Eng. & Systems 2025-06-10 Sumit Sharma , Gopi Raju Matta , Kaushik Mitra

The ability to detect single photons has led to the advancement of numerous research fields. Although various types of single-photon detector have been developed, because of two main factors - that is, (1) the need for operating at…

Instrumentation and Detectors · Physics 2024-09-18 Neil Na , Yen-Cheng Lu , Yu-Hsuan Liu , Po-Wei Chen , Ying-Chen Lai , You-Ru Lin , Chung-Chih Lin , Tim Shia , Chih-Hao Cheng , Shu-Lu Chen

Scene understanding under low-light conditions is a challenging problem. This is due to the small number of photons captured by the camera and the resulting low signal-to-noise ratio (SNR). Single-photon cameras (SPCs) are an emerging…

Image and Video Processing · Electrical Eng. & Systems 2021-08-18 Bhavya Goyal , Mohit Gupta

Single photon avalanche diodes (SPADs) are starting to play a pivotal role in the development of photon-efficient, long-range LiDAR systems. However, due to non-linearities in their image formation model, a high photon flux (e.g., due to…

Computer Vision and Pattern Recognition · Computer Science 2019-04-30 Anant Gupta , Atul Ingle , Andreas Velten , Mohit Gupta

Detecting spatial and temporal information of individual photons by using single-photon-detector (SPD) arrays is critical to applications in spectroscopy, communication, biological imaging, astronomical observation, and quantum-information…

3D Time-of-Flight (ToF) image sensors are used widely in applications such as self-driving cars, Augmented Reality (AR) and robotics. When implemented with Single-Photon Avalanche Diodes (SPADs), compact, array format sensors can be made…

Image and Video Processing · Electrical Eng. & Systems 2023-03-22 Germán Mora Martín , Stirling Scholes , Alice Ruget , Robert K. Henderson , Jonathan Leach , Istvan Gyongy

In order to build a new concept of photomultiplier based on silicon technology, design and characterization of 5x5 arrays of a new generation of single photon avalanche diodes (SPAD) manufactured by ST-Microelectronics have been performed.…

Noninvasive optical imaging through dynamic scattering media has numerous important biomedical applications but still remains a challenging task. While standard diffuse imaging methods measure optical absorption or fluorescent emission, it…

With the evolving technology in CMOS integration, new classes of 2D-imaging detectors have recently become available. In particular, single photon avalanche diode (SPAD) arrays allow detection of single photons at high acquisition rates…

This work presents stochastic approaches to model the counting behavior of actively quenched single-photon avalanche diodes (SPADs) subjected to continuous-wave constant illumination. We present both analytical expressions and simulation…

Instrumentation and Detectors · Physics 2020-08-27 Ivo Straka , Jan Grygar , Josef Hloušek , Miroslav Ježek

A near-infrared (NIR) enhanced silicon single-photon avalanche diode (SPAD) fabricated in a customized 0.13 $\mu$m CMOS technology is presented. The SPAD has a depleted absorption volume of approximately 15 $\mu$m x 15 $\mu$m x 18 $\mu$m.…

Instrumentation and Detectors · Physics 2021-05-13 Edward Van Sieleghem , Andreas Süss , Pierre Boulenc , Jiwon Lee , Gauri Karve , Koen De Munck , Celso Cavaco , Chris Van Hoof

Single photon avalanche diode arrays can provide both the spatial and temporal information of each detected photon. We present here the characterization of entangled light with a sensor specifically designed for quantum imaging…

Efficient simulation of photon registrations in single-photon LiDAR (SPL) is essential for applications such as depth estimation under high-flux conditions, where hardware dead time significantly distorts photon measurements. However, the…

Signal Processing · Electrical Eng. & Systems 2025-06-02 Weijian Zhang , Hashan K. Weerasooriya , Stanley Chan

Single-photon detectors (SPDs) are widely used in applications requiring extremely weak light detection. In the near-infrared region, SPDs based on InGaAs/InP single-photon avalanche diodes (SPADs) are the primary candidates for practical…

Instrumentation and Detectors · Physics 2025-03-07 Chao Yu , Qi Xu , Jun Zhang

Silicon Photomultipliers (SiPMs) are the state-of-the-art technology in single-photon detection with solid-state detectors. Single Photon Avalanche Diodes (SPADs), the key element of SiPMs, can now be manufactured in CMOS processes,…