Effect of selective pumping of polaritons on the optical spectra of a thin layer of CuCl: result of nonlocal response theory

Kikuo Cho; Naoki Matsuura

doi:10.1117/12.200943

9 February 1995 Effect of selective pumping of polaritons on the optical spectra of a thin layer of CuCl: result of nonlocal response theory

Kikuo Cho, Naoki Matsuura

Author Affiliations +

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200943
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

Nonlocal formulation has been applied to a pump probe process (optical Stark effect) for an exciton-biexciton system in a slab of CuCl of thickness d equals 100 - 10000 angstroms. The evolution of the pump probe spectra shows the development of wave number selection rule with increasing d, reflecting the d-dependent spatial variation of radiation field. The spectra contain several different processes at the same time; two-photon absorption to biexciton states, the optical Stark shift and pump induced resonant broadening of exciton levels. The direction of optical Stark shift can be well interpreted by the pump induced change in the linear susceptibility. A comparison with the experiments for thicker samples shows a good agreement for d equals 1500 angstroms sample, but a marked disagreement for micrometers size samples. A comparison with a former theory has been made both analytically and numerically.

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Kikuo Cho and Naoki Matsuura "Effect of selective pumping of polaritons on the optical spectra of a thin layer of CuCl: result of nonlocal response theory", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200943

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