Abstract

Sound generation by a femtosecond laser pulse in a metal layer on a dielectric substrate is studied. The excitation of sound caused by the effect of the ponderomotive force, temperature gradients of electrons, and lattice is considered. A comparison is made of these generation mechanisms for various excitation conditions and frequencies of generated sound. It is shown that in the case when effective collision frequencies in the metal are low, sound generation dominates in the terahertz frequency range due to the ponderomotive effect of the laser pulse.

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Generation of terahertz radiation in dielectric–metal structure irradiated by a femtosecond laser pulse

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Free-electron mechanisms of low-frequency radiation generation on metal surfaces

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Generation of low-frequency radiation under the effect of an ultrashort laser pulse on a semiconductor in a magnetic field

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Competition of quasi-cylindrical and surface waves excited at the femtosecond pulse effect on the metal

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Terahertz radiation from bismuth surface induced by femtosecond laser pulses

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