Abstract

Nanophotonic modes within rectangular cross sections are typically considered to have transverse rectangular field profiles. In this work, we show that, despite the rectangular cross section of most integrated waveguides and microring resonators, there exists considerable hybridization of transverse rectangular modes and transverse circular modes. These hybridized modes can be advantageous in nonlinear wave mixing processes. We use third-harmonic generation as an example to confirm that such a hybridized mode is advantageous in combining reasonable mode overlap and waveguide coupling to a fundamental mode in a silicon nitride microring. Our work illuminates the potential of using transverse circular modes in nanophotonic applications.

© 2021 Optical Society of America

Near-field nonlinear imaging of an anapole mode beyond diffraction limit

Tong Cui, Mingqian Zhang, Yun Zhao, Yuanmu Yang, Benfeng Bai, and Hong-Bo Sun
Opt. Lett. 46(9) 2095-2098 (2021)

Complex modes in optical fibers and silicon waveguides

Nan Zhang and Ya Yan Lu
Opt. Lett. 46(17) 4410-4413 (2021)

Method to obtain the initial value for the inverse design in nanophotonics based on a time-reversal technique

Zhipeng Wang, Bing-Zhong Wang, Jin-Pin Liu, and Ren Wang
Opt. Lett. 46(12) 2815-2818 (2021)

On-chip four-mode (de-)multiplexer on thin film lithium niobate–silicon rich nitride hybrid platform

Yang Liu, Xingrui Huang, Zezheng Li, Huan Guan, Zhiguo Yu, Qingquan Wei, Zhongchao Fan, Weihua Han, and Zhiyong Li
Opt. Lett. 46(13) 3179-3182 (2021)

Large few-layer hexagonal boron nitride flakes for nonlinear optics

Nils Bernhardt, Sejeong Kim, Johannes E. Fröch, Simon J. U. White, Ngoc My Hanh Duong, Zhe He, Bo Chen, Jin Liu, Igor Aharonovich, and Alexander S. Solntsev
Opt. Lett. 46(3) 564-567 (2021)