Resonant excitation of space-charge and photoconductivity waves in semiconductors with shallow energy levels - art. no. 153203

We report resonant excitation of space-charge and photoconductivity waves i n semiconductors with shallow energy levels. We predict the appearance of s everal resonance maxima in the frequency dependence of non-steady-state pho tocurrent excited in a semiconductor material. We show that both the effect ive and actual mobilities of photocarriers can be estimated from the charac teristic resonant frequencies. Experimental measurements of the effective m obility are carried out in photorefractive n-type Bi12SiO20 grown in an atm osphere.