Photoacoustic effect in micro- and nanostructures: numerical simulations of lagrange equations

Abstract

The photoacoustic effect is the formation of sound waves due to absorption of the modulated light pulse by irradiated medium. At the present time, the photoacoustic effect is widely used in biomedical studies, photoacoustic spectroscopy etc. Of particular interest are studies of the interaction of pulsed laser radiation with absorbing micro- and nanostructures. Absorption of laser pulse energy in micro- and nanostructures allows exciting acoustic oscillations in the frequency range from gigahertz to terahertz. Terahertz frequency acoustic vibrations are of special interest for fundamental research and have numerous potential applications (acoustic imaging of nano-objects, acoustic nanocavities, phononic crystals).