title: High-frequency acousto-optic effects in Bragg reflectors.
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.
authors: D J
authors: DJ
authors: Farmer
authors: A V
authors: AV
authors: Akimov
authors: N A
authors: NA
authors: Gippius
authors: J
authors: J
authors: Bailey
authors: J S
authors: JS
authors: Sharp
authors: A J
authors: AJ
authors: Kent