Characterization of space-momentum entangled photons with a time resolving CMOS SPAD array

Eckmann, Bruno; Bessire, Bänz; Unternährer, Manuel; Gasparini, Leonardo; Perenzoni, Matteo; Stefanov, André (2020). Characterization of space-momentum entangled photons with a time resolving CMOS SPAD array. Optics express, 28(21), p. 31553. Optical Society of America 10.1364/OE.401260

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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 applications. The sensors is time-tagging each detection events at the pixel level with sub-nanosecond accuracy, within frames of 50 ns. The spatial correlations between any number of detections in a defined temporal window can thus be directly extracted from the data. We show the ability of the sensor to characterize space-momentum entangled photon pairs emitted by spontaneous parametric downconversion. Their entanglement is demonstrated by violating an EPR-type inequality.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Lasers

UniBE Contributor:

Bessire, Bänz and Stefanov, André

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

1094-4087

Publisher:

Optical Society of America

Language:

English

Submitter:

André Stefanov

Date Deposited:

30 Mar 2022 10:25

Last Modified:

03 Apr 2022 01:56

Publisher DOI:

10.1364/OE.401260

BORIS DOI:

10.48350/167302

URI:

https://boris.unibe.ch/id/eprint/167302

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