Ultrafast optical processes in mercuric iodide

Leah R. Williams; Richard J. M. Anderson

doi:10.1117/12.17905

1 April 1990 Ultrafast optical processes in mercuric iodide

Leah R. Williams, Richard J. M. Anderson

Proceedings Volume 1209, Picosecond and Femtosecond Spectroscopy from Laboratory to Real World; (1990) https://doi.org/10.1117/12.17905
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

Subpicosecond time-resolved transient grating and transient absorption experiments were performed in mercuric iodide, a wide bandgap semiconductor. Sub-bandgap excitation in the Urbach tail induces an index grating which forms in about 2 ps and which exhibits biexponential decay with time constants 60 ps and 1 .5ns. We ascribe this change in the index of refraction to the formation of defect states. In addition, coherent Raman excitation of the 1 14 cm1 Aig lattice mode was observed.

Citation Download Citation

Leah R. Williams and Richard J. M. Anderson "Ultrafast optical processes in mercuric iodide", Proc. SPIE 1209, Picosecond and Femtosecond Spectroscopy from Laboratory to Real World, (1 April 1990); https://doi.org/10.1117/12.17905

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