Entangled photon pair generation in an integrated SiC platform

Entangled photon pair generation in an integrated SiC platform

2024 | Anouar Rahmouni, Ruixuan Wang, Jingwei Li, Xiao Tang, Thomas Gerrits, Oliver Slattery, Qing Li and Lijun Ma
The paper reports the first demonstration of an entangled photon source in an integrated silicon carbide (SiC) platform. The authors achieve the efficient generation of strongly correlated photon pairs at the telecom C-band wavelength through spontaneous four-wave mixing in a compact microring resonator within a 4H-SiC-on-insulator platform. Key results include a maximum coincidence-to-accidental ratio (CAR) exceeding 600 at a pump power of 0.17 mW, corresponding to a pair generation rate of (9 ± 1) × 10^5 pairs/s. Energy-time entanglement is created and verified for the signal-idler photon pairs, with a two-photon interference fringe visibility exceeding 99%. The heralded single-photon properties are also measured, with the heralded g^(2)(0) on the order of 10^-3, demonstrating the SiC platform as a promising fully integrated, CMOS-compatible single-photon source for quantum applications. The study highlights the potential of SiC microresonators as a key resource for chip-scale quantum information processing, comparable to more mature nonlinear integrated photonic platforms.The paper reports the first demonstration of an entangled photon source in an integrated silicon carbide (SiC) platform. The authors achieve the efficient generation of strongly correlated photon pairs at the telecom C-band wavelength through spontaneous four-wave mixing in a compact microring resonator within a 4H-SiC-on-insulator platform. Key results include a maximum coincidence-to-accidental ratio (CAR) exceeding 600 at a pump power of 0.17 mW, corresponding to a pair generation rate of (9 ± 1) × 10^5 pairs/s. Energy-time entanglement is created and verified for the signal-idler photon pairs, with a two-photon interference fringe visibility exceeding 99%. The heralded single-photon properties are also measured, with the heralded g^(2)(0) on the order of 10^-3, demonstrating the SiC platform as a promising fully integrated, CMOS-compatible single-photon source for quantum applications. The study highlights the potential of SiC microresonators as a key resource for chip-scale quantum information processing, comparable to more mature nonlinear integrated photonic platforms.
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