Correlated twin-photon generation in a silicon nitrite loaded thin film PPLN waveguide

2022/09/30 by Antoine Henry, Henry, Antoine, David Barral +11 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2210.00076

openalex publication_date 2022/09/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Photon-pair sources based on thin film lithium niobate on insulator technology have a great potential for integrated optical quantum information processing. We report on such a source of correlated twin-photon pairs generated by spontaneous parametric down conversion in a silicon nitride (SiN) rib loaded thin film periodically poled lithium niobate (LN) waveguide. The generated photon pairs have a wavelength centred at 1560 nm compatible with present telecom infrastructure, a large bandwidth (21 THz) and a brightness of ∼ 2.5× 10⁵ pairs/s/mW/GHz. The photons are correlated and exhibit a cross correlation g⁽²⁾(0) of about 8000. Using the Hanbury Brown and Twiss effect, we have also shown heralded single photon emission, achieving an autocorrelation g⁽²⁾_H(0) ≃ 0.04.

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