氮化硅负载薄膜周期性极化铌酸锂波导中的关联双光子产生。

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

出版信息

Opt Express. 2023 Feb 27;31(5):7277-7289. doi: 10.1364/OE.479658.

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 correlated 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 × 10 pairs/s/mW/GHz. Using the Hanbury Brown and Twiss effect, we have also shown heralded single photon emission, achieving an autocorrelation (2)(0)≃0.04.

摘要

基于薄膜铌酸锂绝缘体技术的光子对源在集成光量子信息处理方面具有巨大的潜力。我们报告了一种相关双光子对源，它是通过在氮化硅（SiN）脊加载的薄膜周期性极化铌酸锂（LN）波导中的自发参量下转换产生的。所产生的相关光子对的波长中心在 1560nm，与现有的电信基础设施兼容，带宽大（21THz），亮度约为 2.5×10 对/s/mW/GHz。我们还利用汉伯里-布朗和汤姆逊效应，展示了被标记的单光子发射，实现了自相关 (2)(0)≃0.04。