High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip

Abstract

We report an efficient energy-time entangled photon-pair source based on four-wave mixing in a CMOS-compatible silicon photonics ring resonator. Thanks to suitable optimization, the source shows a large spectral brightness of 400\,pairs of entangled photons /s/MHz for $500\mu \mathrm{W}$ pump power. Additionally, the resonator has been engineered so as to generate a frequency comb structure compatible with standard telecom dense wavelength division multiplexers. We demonstrate high-purity energy-time entanglement, i.e., free of photonic noise, with near perfect raw visibilities ($>$~98\%) between various channel pairs in the telecom C-band. Such a compact source stands as a path towards more complex quantum photonic circuits dedicated to quantum communication systems.

References in corpus (3)

• CMOS-compatible, multiplexed source of heralded photon pairs: towards integrated quantum combs
• Ultra-low power nonlinear optics in a high Q CMOS compatible integrated micro-ring resonator
• Time-bin entangled photon pair generation from Si micro-ring resonator

Cited by in corpus (7)

• Integrated micro-comb sources for quantum optical applications
• Chip-based photon quantum state sources using nonlinear optics
• Applications of integrated optical microcombs
• High-dimensional frequency-bin entangled photons in an optical microresonator on a chip
• Sending classical information via three noisy channels in superposition of causal orders
• Optical pump-rejection filter based on silicon sub-wavelength engineered photonic structures
• Discrete and parallel frequency-bin entanglement generation from quantum frequency comb