Efficient G-shaped silicon modulator by inverse design of doping profile

Zijian Zhu; Yingxuan Zhao; Fuwan Gan

doi:10.1117/12.3014305

29 December 2023 Efficient G-shaped silicon modulator by inverse design of doping profile

Zijian Zhu, Yingxuan Zhao, Fuwan Gan

Proceedings Volume 12975, 6th Optics Young Scientist Summit (OYSS 2023); 1297507 (2023) https://doi.org/10.1117/12.3014305
Event: 6th Optics Young Scientist Summit, 2023, Changsha, China

Abstract

Silicon modulators play an important role in silicon photonics for efficient modulation and transmission of optical signals. Enhancing the performance of silicon modulators has largely relied on optimizing doping profiles. However, in recent years, progress in finding superior solutions to optimize performance has faced obstacles. To address this challenge, the concept of inverse design, which has gained popularity in passive photonic devices, can be applied to silicon active devices by dividing the doping region into segments and adjusting each segment based on feedback from the results. Consequently, we introduce the inverse design method into modulator doping profile optimization by utilizing the particle swarm optimization (PSO) algorithm, resulting in the attainment of a G-shaped doping profile for the modulator. The proposed modulator demonstrates the superior V_πL of 0.48 V·cm and the low loss of 13.5 dB/cm. The small-signal frequency response suggests a reliable operation range under reverse biases of 1 V to approximately 3 V with the bandwidth over 26 GHz. The G-shaped silicon modulator exhibits impressive modulation efficiency and minimal loss, indicating its high potential for use in microwave front-end applications. The utilization of inverse design holds immense promise in advancing active silicon photonic devices for faster, higher-capacity and more reliable data communication systems.

Citation Download Citation

Zijian Zhu, Yingxuan Zhao, and Fuwan Gan "Efficient G-shaped silicon modulator by inverse design of doping profile", Proc. SPIE 12975, 6th Optics Young Scientist Summit (OYSS 2023), 1297507 (29 December 2023); https://doi.org/10.1117/12.3014305

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