THERMAL RESPONSE OF SILICON CRYSTAL TO PICO-FEMTOSECOND HEAT PULSE BY MOLECULAR DYNAMICS

We investigate the termal response of a silicon crystal irradiated by a pico-femto heat pulse by using molecular dynamics technique and a linear response theory-based statistical analysis. The thermal susceptibility is first defined in terms of computed quantities and then convoluted with time Goussian temperature pulses. The qualitative difference between the response to various pulse durations is explained and the results are compared to those of classical Fourier model. Non-Fourier behaviors are emphasized and a mean phonon relaxation time is identified