Interpretable inverse-designed cavity for nonlinear photon pair generation on-chip

Zhetao Jia; Wayesh Qarony; Jagang Park; Sean Hooten; Difan Wen; Yertay Zhiyenbayev; Matteo Seclì; Walid Redjem; Scott Dhuey; Adam Schwartzberg; Eli Yablonovitch; Boubacar Kanté

doi:10.1117/12.3027955

2 October 2024 Interpretable inverse-designed cavity for nonlinear photon pair generation on-chip

Zhetao Jia, Wayesh Qarony, Jagang Park, Sean Hooten, Difan Wen, Yertay Zhiyenbayev, Matteo Seclì, Walid Redjem, Scott Dhuey, Adam Schwartzberg, Eli Yablonovitch, Boubacar Kanté

Author Affiliations +

Proceedings Volume 13113, Photonic Computing: From Materials and Devices to Systems and Applications; 1311308 (2024) https://doi.org/10.1117/12.3027955
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Inverse design has become a powerful tool in photonics for creating compact, high-performance devices. However, its application has been mostly limited to linear systems, with minimal exploration in nonlinear regimes. Additionally, the ”black box” nature of these techniques limits understanding of the optimized structures. Here, We introduce an inverse design approach to enhance on-chip photon pair generation efficiency using the opensource package EMopt. Our method employs a multi-frequency co-optimization strategy and calculates gradients via the adjoint method. Efficiency improvements result from field intensification in high-quality factor triply-resonant cavity resonances and better phase-matching conditions. We validate our method by fabricating and characterizing an optimized device that efficiently generates photon pairs, adhering to fabrication constraints and suitable for scalable quantum light sources in large-scale computing and communication applications. The design’s shape can be explained using effective potential analysis. This optimization technique can extend to other nonlinear processes for compact on-chip frequency-mixing devices.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhetao Jia, Wayesh Qarony, Jagang Park, Sean Hooten, Difan Wen, Yertay Zhiyenbayev, Matteo Seclì, Walid Redjem, Scott Dhuey, Adam Schwartzberg, Eli Yablonovitch, and Boubacar Kanté "Interpretable inverse-designed cavity for nonlinear photon pair generation on-chip", Proc. SPIE 13113, Photonic Computing: From Materials and Devices to Systems and Applications, 1311308 (2 October 2024); https://doi.org/10.1117/12.3027955

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