Abstract
Photoinduced dichroism caused by bleaching of the interband transition in trans- was observed in the picosecond time domain. The bleaching is induced instantaneously and decays with time as , changing to a lower power after ∼50 psec. Although the photoinduced bleaching persists to long times, polarization memory is lost after ∼ sec. The results provide a measurement of the diffusion constant of the charged excitations; at 300 and 80 K.
- Received 2 August 1982
DOI:https://doi.org/10.1103/PhysRevLett.49.1657
©1982 American Physical Society