Visualization of the internal field in the GaAs-based solar cell under its operating condition with Terahertz radiation

Abstract

We demonstrated the visualization of the internal field in a GaAs-based solar cell under its operating condition with evaluating the first half-period of the terahertz (THz) wave emitted by the simultaneous excitation with the weak ultrashort optical pulse and continuous light. We observed the reduction of the internal field with increasing the intensity of the continuous light, which is relevant to the solar cell performance.