Abstract

We perform time-resolved degenerated four-wave mixing experiments on thin CuCl platelets (thickness of about 30 μm) and epitaxially grown layers (thickness of 5 to 10 μm) at low temperature (2K). The light source is a tunable picosecond dye-laser of 20 ps duration (FWHM) and of 0.3 meV spectral width (FWHM). It is synchronously pumped by the third harmonics of a mode-locked Nd:YAG laser. The dye-laser beam is split into two parts (pump and test) with an intensity ratio of about 8 to 1. The optical delay between both pulses is varied.

© 1988 Optical Society of America