Abstract
We have observed terahertz radiation induced by subband-gap femtosecond optical excitation from GaAs. We belive this is due to screening of the surface depletion field by virtual photocarriers (the inverse Franz-Keldysh effect).
- Received 15 August 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.2709
©1991 American Physical Society
