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arXiv · 2408.03550

Periodically poled thin-film lithium niobate ring Mach Zehnder coupling interferometer as an efficient quantum source of light

Mrinmoy Kundu·Bejoy Sikder·Heqing Huang·Mark Earnshaw·A. Sayem
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Abstract

Single photons and squeezed light are the two primary workhorses for quantum computation and quantum communication. Generating high-efficiency single photons with high purity and heralding efficiency is the prerequisite for photonic quantum computers. At the same time, generating high-efficiency scalable squeezed light is the prerequisite for continuous variable quantum computing along with sensing applications. Here, we propose a symmetric ring-Mach-Zehnder interferometer (RMZI), which includes a periodically poled lithium niobate (PPLN) waveguide as an efficient source of squeezed light and a single-photon source. We numerically show that our proposed design can generate tunable squeezed light with a squeezing level higher than -12dB with sub-milli-watt (mW) pump power. The proposed device can also generate single photons with purity as high as 99(95)% with heralding efficiency 94(99)% using only 20ps long pulses. Our proposed design is fully compatible with current fabrication technology.

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Mrinmoy Kundu, Bejoy Sikder, Heqing Huang, Mark Earnshaw, A. Sayem. 2024-08-07. Periodically poled thin-film lithium niobate ring Mach Zehnder coupling interferometer as an efficient quantum source of light. https://arxiv.org/abs/2408.03550

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