High-frequency acousto-optic effects in bragg reflectors

D. J. Farmer, A. V. Akimov, N. A. Gippius, J. Bailey, J. S. Sharp, A. J. Kent

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Picosecond acoustic interferometry was used to study the acousto-optic properties of a distributed Bragg reflector (DBR) manufactured from two immiscible polymers (cellulose acetate and polyvinylcarbyzole). Picosecond strain pulses were injected into the structure and changes in its reflectance were monitored as a function of time. The reflectance exhibited single-frequency harmonic oscillations as the strain pulse traversed the DBR. A transfer matrix method was used to model the reflectance of the DBR in response to interface modulation and photo-elastic effects. This work shows that photo-elastic effects can account for the acousto-optic response of DBRs with acoustically matched layers.

    Original languageEnglish
    Pages (from-to)15218-15231
    Number of pages14
    JournalOptics Express
    Volume22
    Issue number12
    DOIs
    Publication statusPublished - 16 Jun 2014

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