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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Generating Photon Pairs in a Hybrid Si-BTO Platform

D. Marchant, Imad I. Faruque, J. Barreto

Published Aug 4, 2024• 0 citations
Publisher

Abstract

Here we show photon pair generation in a hybrid silicon-BTO on insulator platform. Analysis of photon generation rates show that SFWM is comparable to SOI devices of similar characteristics with a γeffof (14.7 ± 1.3) and (2.0 ± 0.3) MHz/mW2for ring resonator and waveguide structures respectively.
DOI
10.1109/cleo-pr60912.2024.10676490

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Here we show photon pair generation from ring resonator and waveguide structures in a hybrid silicon-BTO on insulator platform with a pulsed pump. Our analysis of single photon and coincidence generation rates show that Spontaneous Four-Wave Mixing is comparable to that expected from SOI devices of similar characteristics and find a γeffγ_{eff}γeff​ of (14.7 ±\pm± 1.3) and (2.0 ±\pm± 0.3) MHz/mW2^{2}2 for ring resonator and waveguide structures respectively.
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Photon pair sources with the capability to tune the wavelength and correlation properties of the generated photons can be useful for quantum applications such as communication, sensing, and computing. Silicon devices based on the SOI (silicon-on-insulator) platform benefits from both tight modal confinement, due to high index contrast between core and cladding, and CMOS compatible manufacturing process, making it a suitable platform for such sources. In the present work, we discuss the possibility of using planar resonant silicon devices with bend radii of a few tens of microns as photon pair sources. We discuss that a silicon nanophotonic chip consisting of either a single microring or coupled microrings can be used to generate photon pairs around 1.55 um. We discuss that the photons are generated in multiple pairs of wavelengths and can be tuned over several nanometers, demonstrating the capability to generate wavelength division multiplexed photon pairs at freely chosen telecommunication-band wavelengths. Further on, we discuss the ease of control over the bi-photon spectrum of the generated photon pairs and its implication in controlling their correlation properties. Uncorrelated photon pairs can be used to herald a single photon, and correlated photon pairs can be used in various quantum applications such as communication and sensing. In the end, we discuss the design parameters of a single microring resonator based sources.