The microscopic and macroscopic models of photoinduced anisotropy in general and photoinduced optomechanical effect in particular are critically reviewed. Based on current experimental data available a revised macroscopic model of photo-induced anisotropy is given. As opposed to expansion and contraction phenomena considered previously, the photoinduced polarization dependent viscosity change is proposed to explain the experimental data of the optical actuation in chalcogenide glasses.
The presented research relates to the dynamic studies of the so-called optomechanical effect in chalcogenide glasses. We present a novel study of a dynamic response of the atomic force microcantilever balance and chalcogenide glass upon illumination with alternating polarized light up to the resonant frequency of the cantilever. The sharp response peak of the microcantilever system was found at frequencies around ~22.7 kHz, however, the origin of the effect remains speculative. Nevertheless, it has been demonstrated that the cantilever-chalcogenide glass reliably responses to the polarized light change up to a frequency of ~5 kHz (200 μsec) or possibly faster.
Conference Committee Involvement (1)
Optomechatronic Actuators and Manipulation II
1 October 2006 | Boston, Massachusetts, United States