Quantum molecular dynamics study on light to-heat absorption mechanism: two metallic atom system

Abstract

For understanding the fundamental mechanism of light absorption to be converted to the thermal energy, the atomic motions of matters are studied with the quantum molecular dynamics method. As a fundamental atomic system, two metallic atoms are considered to be irradiated with light changing the frequency and intensity. Under infra-red light irradiation, increase in the kinetic energy and atomic dissociation are attributed mainly from the dipole moment fluctuations of ions. Under the irradiation of light at electron energy levels, change in the kinetic energy and dissociation result from the change in the potential energy between particles due to electron excitation.