AN INJECTIONLESS FIR LASER-BASED ON INTERBAND-TRANSITIONS OF HOT HOLES IN GERMANIUM

The results of experimental investigations of an FIR laser on hot hole s in germanium in constant crossed electrical and magnetic fields in t he Voight configuration are presented. Similar studies have been carri ed out before, mainly for the Faraday configuration. The Voight config uration provides a greater intensity, a greater (E, H) region and a wi der spectral range of generation than the Faraday configuration. A new type of injectionless FIR laser is proposed-a heavy hot-hole cyclotro n resonance laser. Calculation of optical gain, alpha(gain), spectral dependence is carried out by balance equations of power and number of particles. The Monte Carlo method is used to calculate light and heavy hot-hole distribution functions and the value of alpha(gain). Some ad vantages of such lasers are presented in comparison with an FIR laser in constant crossed electrical and magnetic fields.