Abstract
Recent advances in organic molecular-beam-epitaxy tecbniques1 are generating new interest in organic crystals as possible materials for nonlinear-optical applications, Femtosecond pump-probe spectroscopy is a powerful tool for investigating the ultrafast spectral dynamics of these materials, enabling us to determine their practicality for high-repetition-rate optical devices. We report here the ultrafast spectral dynamics of a resonantly excited epitaxial chloro-indium phthalocyanine thin film at both 10 and 295 K. The thin film is optically excited at 760 nm, the peak of the Q- band absorption, with a 100-fs, 5-GW/cni2 pump pulse and is probed with a low-intensity broadband continuum pulse.2
© 1993 Optical Society of America
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