Abstract

We theoretically investigate second-harmonic generation (SHG) efficiency in a waveguide-side-coupled photonic nanocavity using coupled-mode-theory-based equations. Using an additional condition for the critical input power, we investigated SHG efficiencies at a very low input power and the critical power. At a very low input power, the SHG efficiency is enhanced by the increase in various $Q$ factors for fundamental and SHG light. Conversely, the maximum SHG efficiency at the critical input power is determined by the $Q$ factors for fundamental light and increases up to 50% in a waveguide-side-coupled photonic nanocavity. Our results provide a design rule for waveguide-side-coupled photonic nanocavities for developing highly efficient SHG devices.

© 2016 Optical Society of America

Highly efficient second-harmonic generation of a reflective waveguide-coupled photonic nanocavity

Heungjoon Kim, Dongyeon Daniel Kang, and Bong-Shik Song
Opt. Lett. 44(7) 1837-1840 (2019)

Investigation of optical nonlinearities in an ultra-high-Q Si nanocavity in a two-dimensional photonic crystal slab

Toshitsugu Uesugi, Bong-Shik Song, Takashi Asano, and Susumu Noda
Opt. Express 14(1) 377-386 (2006)

High-efficiency second-harmonic generation in doubly-resonant χ⁽²⁾ microring resonators

Zhuan-Fang Bi, Alejandro W. Rodriguez, Hila Hashemi, David Duchesne, Marko Loncar, Ke-Ming Wang, and Steven G. Johnson
Opt. Express 20(7) 7526-7543 (2012)

Propagation and second-harmonic generation of electromagnetic waves in a coupled-resonator optical waveguide

Youg Xu, Reginald K. Lee, and Amnon Yariv
J. Opt. Soc. Am. B 17(3) 387-400 (2000)

Phase-matched second-harmonic generation in coupled nonlinear optical waveguides

Bodong Liu, Huakang Yu, Zhi-yuan Li, and Limin Tong
J. Opt. Soc. Am. B 36(10) 2650-2658 (2019)