Simultaneous manipulation of electromagnetic and elastic waves via glide symmetry phoxonic crystal waveguides

TL;DR

This paper introduces a glide symmetry phoxonic crystal waveguide that enables simultaneous propagation of electromagnetic and elastic waves, with tunable guided modes and potential for advanced optomechanical devices.

Contribution

It presents a novel glide symmetry design for phoxonic waveguides that supports gapless, single-mode guided waves for both electromagnetic and elastic waves, with tunable properties.

Findings

Supports simultaneous electromagnetic and elastic wave propagation.

Features gapless, single-mode guided bands over large frequency ranges.

Allows tuning of guided modes via glide dislocation adjustments.

Abstract

A phoxonic crystal waveguide with the glide symmetry is designed, in which both electromagnetic and elastic waves can propagate along the glide plane at the same time. Due to the band-sticking effect, super-cell bands of the waveguide degenerate in pairs at the boundary of the Brillouin zone, causing the appearance of gapless guided-modes in the bandgaps. The gapless guided-modes are single-modes over a relatively large frequency range. By adjusting the magnitude of the glide dislocation, the edge bandgaps of the guided-modes can be further adjusted, so as to achieve photonic and phononic single-mode guided-bands with relatively flat dispersion relationship. In addition, there exists acousto-optic interaction in the cavity constructed by the glide plane. The proposed waveguide has potential applications in the design of novel optomechanical devices.