arXiv 2407.047922024-07-05physics.opticsquant-ph

利用集成光子学生成宽带纠缠光子对：指南与材料比较

Broadband Entangled-Photon Pair Generation with Integrated Photonics: Guidelines and A Materials Comparison

Liao Duan, Trevor J. Steiner, Paolo Pintus, Lillian Thiel, Joshua E. Castro, John E. Bowers, Galan Moody

AI总结：

本文比较多种非线性集成光子材料中的自发四波混频，通过几何色散工程实现宽带可见光—电信纠缠光子对，并给出高产生率的鲁棒设计。

摘要：

关联光子对源是量子计算、量子网络和量子传感应用的关键组件。集成光子学已使利用非线性过程的芯片级光源成为可能，可在电信波长以低于100微瓦的功率产生高速率纠缠。许多量子系统工作在可见光或近红外波段，因此需要宽带可见光—电信纠缠光子对源，以通过纠缠交换和量子隐形传态连接远程系统。本研究评估了在多种非线性集成光子材料中通过自发四波混频产生宽带纠缠的情况，包括氮化硅、铌酸锂、砷化铝镓、磷化铟镓和氮化镓。我们展示了几何色散工程如何促进每个平台的相位匹配，并揭示了出乎意料的结果，例如对制备变化具有鲁棒性的设计，以及III–V族材料中可扩展工作带宽的I型交叉偏振相位匹配条件。在实验可实现的参数下，采用优化设计的集成光子微谐振器可实现大于约1 THz/mW²的光子对产生率。

英文摘要：

Correlated photon-pair sources are key components for quantum computing, networking, and sensing applications. Integrated photonics has enabled chip-scale sources using nonlinear processes, producing high-rate entanglement with sub-100 microwatt power at telecom wavelengths. Many quantum systems operate in the visible or near-infrared ranges, necessitating broadband visible-telecom entangled-pair sources for connecting remote systems via entanglement swapping and teleportation. This study evaluates broadband entanglement generation through spontaneous four-wave mixing in various nonlinear integrated photonic materials, including silicon nitride, lithium niobate, aluminum gallium arsenide, indium gallium phosphide, and gallium nitride. We demonstrate how geometric dispersion engineering facilitates phase-matching for each platform and reveals unexpected results, such as robust designs to fabrication variations and a Type-1 cross-polarized phase-matching condition for III-V materials that expands the operational bandwidth. With experimentally attainable parameters, integrated photonic microresonators with optimized designs can achieve pair generation rates greater than ~1 THz/mW$^2$.

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