Scientific Results

Ultrafast single-photon detection at high repetition rates based on optical Kerr gates under focusing

Year: 2021

Authors: Fattah A. Flatae A.M., Farrag A., Agio M.

Autors Affiliation: Laboratory of Nano-Optics and Cμ, University of Siegen, 57072 Siegen, Germany; National Institute of Optics (INO), National Research Council (CNR), 50125 Florence, Italy

Abstract: The ultrafast detection of single photons is currently restricted by the limited time resolution (a few picoseconds) of the available single-photon detectors. Optical gates offer a faster time resolution, but so far they have been applied mostly to ensembles of emitters. Here, we demonstrate through a semi-analytical model that the ultrafast time-resolved detection of single quantum emitters can be possible using an optical Kerr shutter at gigahertz rates under focused illumination. This technique provides sub-picosecond time resolution, while keeping a gate efficiency at around 85%. These findings lay the ground for future experimental investigations on the ultrafast dynamics of single quantum emitters, with implications for quantum nanophotonics and molecular physics.

Journal/Review: OPTICS LETTERS

Volume: 46 (3)      Pages from: 560  to: 563

KeyWords: optical Kerr shutter, quantum emitters, ultrafast
DOI: 10.1364/OL.414895