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 : https://apps.dtic.mil/dtic/tr/fulltext/u2/1016738.pdf


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