Paper 13369-66
High-performance photon-pair source using a two-photon polymerized strip-loaded lithium niobate waveguide
Abstract
Integrated photon-pair sources utilizing Spontaneous Parametric Down-Conversion (SPDC) are gaining interest for their role in advancing quantum computing, metrology, and encryption technologies. Realizing efficient thin-film fabrication methods is crucial for mass production. Traditional techniques like etching, and lithography are time-consuming, expensive, and difficult to rectify. The two-photon polymerization (2PP) technique provides several advantages, including versatile substrate options, easy erasure and reprinting of structures, and rapid prototyping. We used 2PP to fabricate a strip-loaded lithium niobate waveguide chip as a photon pair source. Our platform showed an on-chip Pair Generation Rate (PGR) of 34.35 MHz, a generation efficiency of 60.71 MHz/mW, and a Coincidence-to-Accidental Ratio (CAR) of 5939. Erasing and reprinting the waveguides demonstrated the high reproducibility of our method. These results underscore the reliability and industrial potential.
Presenter
Institut für Photonik, Leibniz Univ. Hannover (Germany), Laser Zentrum Hannover e.V. (Germany), Exzellenzcluster PhoenixD, Leibniz Univ. Hannover (Germany)