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Proceedings Paper

Enhanced third-order nonlinear optical responses from optically pumped electronic excited states
Author(s): Yongming Cai; Qihou L. Zhou; Rui-Fang Shi; M. H. Wu; D. C. Rodenberger; Anthony F. Garito
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Paper Abstract

In this paper, we review the microscopic description for nonlinear optical processes originating from populated electronic excited states and examine an enhancement mechanism for third order optical processes. For a general case, we consider the third order (formula available in paper) excited state susceptibilities for linear chains that have been previously well-studied for their ground state nonlinear optical properties. We see that for a given frequency, enhancement can occur in the excited state (formula available in paper) and the origin and mechanism of the enhancement can be directly understood in terms of new virtual excitation processes. In section III, we summarize a recently completed experimental study of enhanced excited state third harmonic generation in conjugated structures.

Paper Details

Date Published: 11 May 1993
PDF: 13 pages
Proc. SPIE 1979, 1992 International Conference on Lasers and Optoelectronics, (11 May 1993); doi: 10.1117/12.144183
Show Author Affiliations
Yongming Cai, Univ. of Pennsylvania (United States)
Qihou L. Zhou, Univ. of Pennsylvania (United States)
Rui-Fang Shi, Univ. of Pennsylvania (United States)
M. H. Wu, Univ. of Pennsylvania (United States)
D. C. Rodenberger, Univ. of Pennsylvania (United States)
Anthony F. Garito, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 1979:
1992 International Conference on Lasers and Optoelectronics

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