RADIATIVE COOLING UNDER THE CONDITIONS OF MAGNETOCONCENTRATION

The results of theoretical and experimental studies of the time depend ences of radiative cooling produced by a pulsed semiconductor source o f negative interband luminescence are presented. The kinetics of cooli ng and subsequent temperature relaxation of the passive element, which depend on the power and duration of the luminescence pulse, are studi ed. It is shown that the luminescence excitation method employed (the magnetoconcentration effect) makes possible both radiative cooling and heating of the passive element; this is promising for practical appli cations. The results of a theoretical study are in qualitative agreeme nt with the experimental data. The maximum cooling achieved in the exp eriment at room temperature is 0.62 K. (C) 1997 American Institute of Physics.