ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We present an experimental technique that allows for the detection of pump-induced transmission and phase changes with high sensitivity and ultrafast temporal resolution over an arbitrarily wide time window. This is achieved combining spectral interferometry with high-frequency-chopping differential transmission measurements. With this setup, exciton and continuum nonlinearities in a semiconductor are studied for broadband excitation. We find that the pump-induced phase changes at the exciton and in the continuum decay on distinctly different time scales, indicating different microscopic origins. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.373796