A silicon source of heralded single photons at 2 $μ$m

S. Signorini; M. Sanna; S. Piccione; M. Ghulinyan; P. Tidemand-Lichtenberg; C. Pedersen; L. Pavesi

doi:10.1063/5.0063393

paper

A silicon source of heralded single photons at 2 $μ$ m

arXiv:2108.01031 · doi:10.1063/5.0063393

Abstract

Mid infrared integrated quantum photonics is a promising platform for applications in sensing and metrology. However, there are only few examples of on-chip single photon sources at these wavelengths. These have limited performances with respect to their C-band counterparts. In this work, we demonstrate a new approach to generate heralded single photons in the mid infrared on a silicon chip. By using a standard C-band pump, the inter-modal spontaneous four wave mixing enables the generation of the herald idler at 1259.7 nm and the heralded signal at 2015 nm. The idler photon is easily detected with a common infrared single photon detector while the signal photon is upconverted to the visible before its detection. In this way, we are able to operate a mid infrared source without the need of mid infrared detectors and laser sources. By measuring a heralded $g^{(2)}$ of $0.23 \pm 0.08$ we demonstrate the single photon behaviour of the source as well as the feasibility of multi-photon coincidence measurements beyond 2 $μ$ m with our setup. The source exhibits a high intrinsic heralding efficiency of $(59 \pm 5) %$ , a maximum coincidence to accidental ratio of $40.4 \pm 0.9$ and a generation probability of $(0.72 \pm 0.10)$ W $^{- 2}$ .

A silicon source of heralded single photons at 2 $μ$ m

Abstract

References in corpus (13)

Cited by in corpus (3)

A silicon source of heralded single photons at 2 μm

Abstract

References in corpus (13)

Cited by in corpus (3)

A silicon source of heralded single photons at 2 $μ$ m