Transient Grating Spectroscopy In CuCl

Bernard Kippelen; Roland Levy; Bernd Honerlage; Jean B. Grun

doi:10.1117/12.961397

22 December 1989 Transient Grating Spectroscopy In CuCl

Bernard Kippelen, Roland Levy, Bernd Honerlage, Jean B. Grun

Proceedings Volume 1127, Nonlinear Optical Materials II; (1989) https://doi.org/10.1117/12.961397
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France

Abstract

Picosecond wave-mixing experiments are performed on CuCl at low temperature near the two-photon absorption resonance of the biexciton. In a two-beam configuration, a degenerate four-wave mixing experiment, using a streak camera system, enables us to separate two different contributions to the generation of the signal : self-diffraction and induced recombination. Transverse relaxation times of the biexciton could thus be determined. In a three-beam configuration, the test pulse is diffracted on the grating induced by two interfering pump pulses. The time evolution of this grating is governed by coherent and incoherent scattering processes. Due to the incoherent part, a signal is observed on a much longer time scale than in a two-beam configuration where only coherent processes show-up. Its decay presents different time constants which characterize the time evolution of the different quasiparticle populations determining the optical properties of the material.

Citation Download Citation

Bernard Kippelen, Roland Levy, Bernd Honerlage, and Jean B. Grun "Transient Grating Spectroscopy In CuCl", Proc. SPIE 1127, Nonlinear Optical Materials II, (22 December 1989); https://doi.org/10.1117/12.961397

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