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Temporal photon correlation measurement, instrumental to probing the quantum properties of light, typically requires multiple single photon detectors. Progress in single photon avalanche diode (SPAD) array technology highlights their…

We report on a novel device capable of imaging second-order spatio-temporal correlations g2(x,t) between photons. The imager is based on a monolithic array of single-photon avalanche diodes (SPAD) implemented in CMOS technology and a simple…

Quantum Physics · Physics 2009-01-11 D. L. Boiko , N. J. Gunther , N. Brauer , M. Sergio , C. Niclass , G. B. Beretta , E. Charbon

We demonstrate coincidence measurements of spatially entangled photons by means of a novel type of multi-pixel based detection array. The adopted sensor is a fully digital 8$\times$16 silicon photomultiplier array allowing not only photon…

Instrumentation and Detectors · Physics 2016-12-19 Manuel Unternährer , Bänz Bessire , Leonardo Gasparini , David Stoppa , André Stefanov

Intensity correlation measurements form the basis of many experiments based on spontaneous parametric down-conversion. In the most common situation, two single-photon avalanche diodes and coincidence electronics are used in the detection of…

Quantum Physics · Physics 2013-07-15 Daniel S. Tasca , Matthew P. Edgar , Frauke Izdebski , Gerald S. Buller , Miles J. Padgett

Single-photon-avalanche diode (SPAD) arrays are essential tools in biophotonics, optical ranging and sensing and quantum optics. However, their small number of pixels, low quantum efficiency and small fill factor have so far hindered their…

Quantum Physics · Physics 2021-04-21 Hugo Defienne , Jiuxuan Zhao , Edoardo Charbon , Daniele Faccio

High-resolution 3D tracking with sub-nanosecond timing is required for the detection of elementary particles, such as neutrinos. Conventional detectors, which utilize analog silicon photomultipliers, face challenges in balancing spatial…

Instrumentation and Detectors · Physics 2025-11-24 Kodai Kaneyasu , Till Dieminger , Matthew Franks , Davide Sgalaberna , Claudio Bruschini , Edoardo Charbon

We present a novel structured light technique that uses Single Photon Avalanche Diode (SPAD) arrays to enable 3D scanning at high-frame rates and low-light levels. This technique, called "Single-Photon Structured Light", works by sensing…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Varun Sundar , Sizhuo Ma , Aswin C. Sankaranarayanan , Mohit Gupta

Typically, optical microscopy uses the wavelike properties of light to image a scene. However, photon arrival times provide more information about emitter properties than the classical intensity alone. Here, we show that the Hanbury Brown…

Quantum Physics · Physics 2020-01-15 Josef G. Worboys , Daniel W. Drumm , Andrew D. Greentree

Single-photon avalanche diode (SPAD) arrays are solid-state detectors offering imaging capabilities at the level of individual photons, with unparalleled photon counting and time-resolved performance. This fascinating technology has…

Instrumentation and Detectors · Physics 2019-03-19 Claudio Bruschini , Harald Homulle , Ivan Michel Antolovic , Samuel Burri , Edoardo Charbon

SPAD arrays are becoming a popular choice for measuring two-photon interference effects thanks to their high timing precision, fast readout, and high quantum efficiency. However, such sensors are affected by cross-talk that may mimic the…

Temporal photon correlations have been a crucial resource for quantum and quantum-enabled optical science for over half a century. However, attaining non-classical information through these correlations has typically been limited to a…

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…

The second order photon correlation g^(2)(tau) of a chaotic optical-feedback semiconductor laser is precisely measured using a Hanbury Brown-Twiss interferometer. The accurate g^(2)(tau) with non-zero delay time is obtained experimentally…

Quantum Physics · Physics 2019-11-22 Xiaomin Guo , Chen Cheng , Tong Liu , Xin Fang , Yanqiang Guo

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.…

Single-photon avalanche diodes (SPADs) are an emerging technology with a unique capability of capturing individual photons with high timing precision. SPADs are being used in several active imaging systems (e.g., fluorescence lifetime…

Image and Video Processing · Electrical Eng. & Systems 2019-04-25 Atul Ingle , Andreas Velten , Mohit Gupta

The second-order photon correlation function is of great importance in quantum optics which is typically measured with the Hanbury Brown and Twiss interferometer which employs a pair of single-photon detectors and a dual-channel time…

Quantum Physics · Physics 2021-02-02 Shaojie Liu , Xing Lin , Feng Liu , Hairui Lei , Wei Fang , Chaoyuan Jin

Photon correlations and cross-correlations of light scattered by a regular structure of strongly driven atoms are investigated. At strong driving, the scattered light separates into distinct spectral bands, such that each band can be…

Quantum Physics · Physics 2007-05-23 M. Macovei , J. Evers , C. H. Keitel

Interferometric methods have been recently investigated to achieve sub-Rayleigh imaging and precision measurements of faint incoherent sources up to the ultimate quantum limit. Here we consider single-photon imaging of two point-like…

Quantum Physics · Physics 2024-02-28 Luigi Santamaria Amato , Fabrizio Sgobba , Cosmo Lupo

Single-photon avalanche diodes (SPADs) are an emerging sensor technology capable of detecting individual incident photons, and capturing their time-of-arrival with high timing precision. While these sensors were limited to single-pixel or…

Computer Vision and Pattern Recognition · Computer Science 2020-06-23 Sizhuo Ma , Shantanu Gupta , Arin C. Ulku , Claudio Bruschini , Edoardo Charbon , Mohit Gupta

Single-photon detectors are ``blind" after the detection of a photon, and thereafter display a characteristic recovery in efficiency, during which the number of undetected photons depends on the statistics of the incident light. We show how…

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