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Optics Communications

A study on the optical nonlinearity due to the Z3 and Z1,2 excitons of CuCl by the reflected four-wave mixed light generation

Goro Mizutani, N. Nagasawa

Published May 1, 1984• 20 citations
Publisher
DOI
10.1016/0030-4018(84)90007-5

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Abstract The optical nonlinearity associated with the giant two‐photon absorption, GTA, of excitonic molecules in CuCl is discussed. The metamorphoses of the four‐wave mixing spectra due to the generation of the exciton grating are demonstrated by the observation of their polarization characteristics. The propagation characteristics of the excitation around the GTA resonance are observed by micro‐Raman spectroscopy. The two‐photon Raman scattering light is used as a probe to monitor the spatial character of the excitation. The propagation characteristics show a drastic change in the very narrow spectral range around the GTA resonance energy.