High visibility time-energy entangled photons from a silicon nanophotonic chip

Abstract

Advances in quantum photonics have shown that chip-scale quantum devices are translating from the realm of basic research to applied technologies. Recent developments in integrated photonic circuits and single photon detectors indicate that the bottleneck for fidelity in quantum photonic processes will ultimately lie with the photon sources. We present and demonstrate a silicon nanophotonic chip capable of emitting telecommunication band photon pairs that exhibit the highest raw degree of time-energy entanglement from a micro/nanoscale source, to date. Biphotons are generated through cavity-enhanced spontaneous four-wave mixing (SFWM) in a high-Q silicon microdisk resonator, wherein the nature of the triply-resonant generation process leads to a dramatic Purcell enhancement, resulting in highly efficient pair creation rates as well as extreme suppression of the photon noise background. The combination of the excellent photon source and a new phase locking technique, allow for the observation of a nearly perfect coincidence visibility of (96.6 $\pm$ 1.1)$\%$, without any background subtraction, at a large pair generation rate of (4.40 $\pm$ 0.07) $\times$ 10${}^5$ pairs/s.

References in corpus (6)

• Photonic quantum technologies
• On-Chip Detection of Entangled Photons by Scalable Integration of Single-Photon Detectors
• Time-bin entangled photon pair generation from Si micro-ring resonator
• High-fidelity operation of quantum photonic circuits
• High-visibility multi-photon interference of Hanbury Brown - Twiss type for classical light
• Design and characterization of integrated components for SiN photonic quantum circuits

Cited by in corpus (9)

• Photonic quantum information processing: a review
• Spontaneous photon-pair generation at the nanoscale
• High-quality photonic entanglement based on a silicon chip
• Submegahertz spectral width photon pair source based on fused silica microspheres
• Information processing at the speed of light
• Energy-time and time-bin entanglement: past, present and future
• Quantum States of Higher-order Whispering gallery modes in a Silicon Micro-disk Resonator
• Arbitrary-phase locking of fiber Mach-Zehnder interferometers
• Coherent quantum dynamics of systems with coupling-induced creation pathways