Field Distribution and Current Saturation in Photoconductive CdS

Abstract

The internal electric field distribution has been measured in photoconducting CdS single crystals using the linear electro-optic effect. The experimental results show a nearly homogeneous field distribution in the crystals for applied fields below the threshold for acoustoelectric oscillations, while a high-field region was created near the anode for fields above the threshold field. The reproducibility from sample to sample was' rather poor. The linear electro-optic constant was calculated from the experimental results:(r'113-r'm) =2.7XIQ-12 m/V at the optical wavelength 6328 A.