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Frontiers in Optics

Analysis of Squeezed Light Generation via SFWM in a Si3N4 Microring Resonator

Masiha Rabiei, Hassan Kaatuzian, Mahmood Hasani, Atena Shircharandabi

Published Jan 1, 2024• 1 citation
Publisher

Abstract

This work investigates the generation of squeezed light states through spontaneous four-wave mixing (SFWM) using a silicon nitride (Si3N4) waveguide coupled to a microring resonator which holds promise as a source for quantum technologies.
DOI
10.1364/fio.2024.jd4a.30

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Photonic chips with silicon nitride (Si3N4\mathrm{Si_3N_4}Si3​N4​) microring resonators are well established as heralded single-photon sources, but their operation as frequency-degenerate twin-photon sources has not previously been demonstrated. Here, we realise a twin-photon source at telecommunication wavelengths in a Si3N4\mathrm{Si_3N_4}Si3​N4​ ring microresonator via an inverse four-wave mixing (FWM) process, in which two photons from spectrally distinct pumps are converted into a pair of identical twin photons. The measurements show a maximum coincidence-to-accidental ratio (CAR) of 5.4±0.65.4\pm0.65.4±0.6. In addition, the microresonator functions as a heralded single-photon source through pump-degenerate spontaneous four-wave mixing (SFWM), exhibiting a spectral purity of P=0.67±0.05P=0.67\pm0.05P=0.67±0.05 and a heralded anti-bunching of gh(2)(0)=0.0042±0.0015g^{(2)}_h(0)=0.0042\pm0.0015gh(2)​(0)=0.0042±0.0015. Together, these results demonstrate both photon-generation schemes on a single integrated Si3N4\mathrm{Si_3N_4}Si3​N4​ platform, highlighting its potential for scalable, tailored quantum light generation.