Abstract
Optomechanical effects in polar solids result from the combination of two main processes, electric field-induced strain and photon-induced voltages. Whereas the former depends on the electrostrictive ability of the sample to convert electric energy into mechanical energy, the latter is caused by the capacity of photons with appropriate energy to generate charges and, therefore, can depend on wavelength. We report here on mechanical deformation of BiFeO and its response time to discrete wavelengths of incident light ranging from 365 to 940 nm. The mechanical response of BiFeO is found to have two maxima in near-UV and green spectral wavelength regions.
- Received 19 October 2011
DOI:https://doi.org/10.1103/PhysRevB.85.092301
©2012 American Physical Society