Multimode nanobeam cavities for nonlinear optics: high quality resonances separated by an octave

TL;DR

This paper presents the design, fabrication, and characterization of nanobeam cavities with multiple high-Q modes separated by an octave, enabling advanced nonlinear optical applications.

Contribution

It introduces novel nanobeam cavity designs with two high-Q modes separated by an octave, demonstrating fabrication of resonances with large wavelength separations.

Findings

Resonances with wavelength separations up to 740 nm achieved.

Nanobeam cavities with multiple higher order modes demonstrated.

High quality factors maintained across separated modes.

Abstract

We demonstrate the design, fabrication and characterization of nanobeam cavities with multiple higher order modes. Designs with two high Q modes with frequency separations of an octave are introduced, and we fabricate such cavities exhibiting resonances with wavelength separations of up to 740 nm.