Effect of radiative losses on the parabolic two-step heat conduction model

The effects of radiative thermal losses on the thermal behavior of thin met al films, as described by the parabolic two-step heat conduction model, are investigated. Different criteria, which determine the ranges within which thermal losses are significant, are derived. The effects of these criteria on the thermal losses from the thin film are investigated. It is found that radiative losses from metal films are significant when the ratio of the di ffused energy within the electron gas to the exchanged energy between the e lectron gas and the solid lattice is larger than one. Also, it is found tha t radiative losses are significant when the ratio of the radiative lost ene rgy to the exchanged energy between the electron gas and the solid lattice is larger than 10(-5).