Ulsig Emil Z, Madsen Magnus L, Stanton Eric J, Reddy Dileep V, Leger Alexandre Z, Sørensen Simon R, Godoy Pedro H, Degli-Eredi Iterio, Stevens Martin J, Hamel Deny R, Shalm Lynden K, Mirin Richard P, Volet Nicolas
Opt Express. 2024 Oct 7;32(21):36986-37000. doi: 10.1364/OE.523615.
Integrated coherent mid-infrared (mid-IR) sources are crucial for spectroscopy and quantum frequency conversion (QFC) to facilitate scalable fiber-based application of single photons. Direct mid-IR emission with broad tunability poses fundamental challenges from the gain media and mirror components. This paper presents a characterization of a second-order nonlinear platform. It showcases a mid-IR parametric coherent source with a continuous tuning range exceeding 230 nm centered around 2425 nm, achieved through difference-frequency generation (DFG). The nonlinear coefficient d of gallium arsenide (GaAs) and aluminum gallium arsenide (AlGaAs) on insulator is experimentally determined via second-harmonic generation (SHG) in waveguides of various lengths, and the tolerance of the process is investigated. These materials are explored for their high conversion efficiency, utilizing monolithic epitaxial quantum dots and integrated waveguides for QFC. The results demonstrate efficient and tunable mid-IR emission suitable for compact, scalable quantum emitters, with applications in environmental and health monitoring.
集成相干中红外（mid-IR）光源对于光谱学和量子频率转换（QFC）至关重要，有助于实现基于光纤的单光子可扩展应用。具有宽可调谐性的直接中红外发射在增益介质和反射镜组件方面带来了根本性挑战。本文介绍了一个二阶非线性平台的特性。它展示了一个中红外参量相干光源，通过差频产生（DFG）实现了在2425nm附近超过230nm的连续调谐范围。通过在不同长度的波导中进行二次谐波产生（SHG）实验测定了绝缘体上砷化镓（GaAs）和铝镓砷（AlGaAs）的非线性系数d，并研究了该过程的容差。利用单片外延量子点和集成波导进行QFC，探索了这些材料的高转换效率。结果表明，高效且可调谐的中红外发射适用于紧凑、可扩展的量子发射器，可应用于环境和健康监测。
