Abstract

The optical properties of a pair of directly interacting cavities, side-coupled to a waveguide, are investigated analytically by the coupled-mode theory. Due to the indirect coupling via waveguide, the resonance split can be controlled through the involved direct coupling coefficients and the indirect coupling phase shift. As a result, a variety of complete transmissions, two different types of one-peak reflectivity profiles, and two-peak reflectivity profiles can be obtained. All the predictions of the resonator-waveguide coupling systems obtained theoretically are validated numerically by the finite-difference time-domain method in photonic crystals.

© 2020 Optical Society of America

Designing a Fano-resonance-based temperature sensor by side-coupling double cavities to waveguide in photonic crystals

Hong Wu, Hua Zhang, Feng Li, and Wei Su
Appl. Opt. 61(34) 10267-10274 (2022)

Propagation in photonic crystal coupled-cavity waveguides with discontinuities in their optical properties

Ben Z. Steinberg and Amir Boag
J. Opt. Soc. Am. B 23(7) 1442-1450 (2006)

Coupled mode theory analysis of mode-splitting in coupled cavity system

Qiang Li, Tao Wang, Yikai Su, Min Yan, and Min Qiu
Opt. Express 18(8) 8367-8382 (2010)

Coupled-resonator-induced transparency in photonic crystal waveguide resonator systems

Jianhong Zhou, Da Mu, Jinhua Yang, Wenbo Han, and Xu Di
Opt. Express 19(6) 4856-4861 (2011)

Coupled mode theory for photonic crystal cavity-waveguide interaction

Edo Waks and Jelena Vuckovic
Opt. Express 13(13) 5064-5073 (2005)