Accession Number : AD1016738

Title :   Guided Acoustic and Optical Waves in Silicon-on-Insulator for Brillouin Scattering and Optomechanics

Descriptive Note : OSTP Journal Article

Corporate Author : Stanford Univ Stanford United States

Personal Author(s) : Sarabalis,Christopher J ; Hill,Jeff T ; Safavi-Naeini,Amir H

Full Text :

Report Date : 01 Aug 2016

Pagination or Media Count : 7

Abstract : We numerically study silicon waveguides on silica showing that it is possible to simultaneously guide optical and acoustic waves in the technologically important silicon on insulator (SOI) material system. Thin waveguides, or fins, exhibit geometrically softened mechanical modes at gigahertz frequencies with phase velocities below the Rayleigh velocity in glass, eliminating acoustic radiation losses. We propose slot waveguides on glass with telecom optical frequencies and strong radiation pressure forces resulting in Brillouin gains on the order of 500 and 50 000 W-1m-1for backward and forward Brillouin scattering, respectively.

Descriptors :   ACOUSTIC WAVEGUIDES , Brillouin scattering , Silicon , optical materials , acoustic waves , Silicon on insulator , FINS , photonics

Distribution Statement : APPROVED FOR PUBLIC RELEASE