Reactive-Coupling-Induced Normal Mode Splittings in Microdisk Resonators Coupled to Waveguides

TL;DR

This paper investigates reactive coupling in microdisk resonators coupled to waveguides, demonstrating that normal mode splitting can occur solely due to reactive coupling, and proposes an experimental method to observe this effect.

Contribution

It introduces a study of reactive coupling effects in microdisk resonators, highlighting a novel mechanism for normal mode splitting independent of dispersive coupling.

Findings

Reactive coupling causes normal mode splitting without dispersive effects

Proposes a pump-probe method to detect reactive-coupling-induced splitting

Enhances understanding of optomechanical interactions in microresonators

Abstract

We study the optomechanical design introduced by M. Li et al. [Phys. Rev. Lett. {\bf 103}, 223901 (2009)], which is very effective for investigation of the effects of reactive coupling. We show the normal mode splitting which is due solely to reactive coupling rather than due to dispersive coupling. We suggest feeding the waveguide with a pump field along with a probe field and scanning the output probe for evidence of reactive-coupling-induced normal mode splitting.