Efficient frequency conversion of low-intensity light in AlGaAs-on-insulator waveguides

Emil Z. Ulsig; Iterio Degli-Eredi; Nicolas Volet

doi:10.1117/12.2607179

4 March 2022 Efficient frequency conversion of low-intensity light in AlGaAs-on-insulator waveguides

Emil Z. Ulsig, Iterio Degli-Eredi, Nicolas Volet

Proceedings Volume 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; 119850D (2022) https://doi.org/10.1117/12.2607179
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

A design study is presented for difference-frequency generation (DFG) in aluminum gallium arsenide (AlGaAs)- on-insulator waveguides. AlGaAs is a mature technology platform with large optical nonlinearities, a high refractive index contrast, and the presence of second-order susceptibility, making it interesting for chip-based frequency conversion. This work targets to efficiently down-convert single-photons to the telecom C-band by DFG. Modal phase-matching (PhM) is used, where the waveguide dimensions are optimized for an efficient and robust conversion of single-photons at 930 nm to around 1550 nm. This paves the way for a single-photon converter that can be integrated on a chip-platform with a single-photon emitters, along other photonic components with standard fabrication techniques. Furthermore, a thorough revision of the DFG theory provides insight into the particular case of a low-powered pump, which is relevant for quantum applications. Finally, a comparison is made with state of the art devices in periodically poled thin film lithium niobate (PPLN). This is, to the best of our knowledge, the first design of a single-photon converter operating in the telecom band that is realized with a III-V material.

Conference Presentation

Citation Download Citation

Emil Z. Ulsig, Iterio Degli-Eredi, and Nicolas Volet "Efficient frequency conversion of low-intensity light in AlGaAs-on-insulator waveguides", Proc. SPIE 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, 119850D (4 March 2022); https://doi.org/10.1117/12.2607179

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