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Proceedings Paper

New routes to large optical nonlinearities (Invited Paper)
Author(s): Linda S. Sapochak; Malcolm R. McLean; Mai Chen; Larry Raymond Dalton; Luping Yu
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Paper Abstract

Optical nonlinearities can arise as the result of intense electromagnetic radiation fields inducing either changes in electron or nuclear configurations. Indeed, as is discussed in this paper, several mechanisms, including mechanisms depending upon electron-phonon coupling, may be elicited from the same material. The precise contribution that a given mechanism makes to observed optical nonlinearity is often dependent upon pulse conditions employed in transient nonlinear optical experiments. The ability to control optical nonlinearity by pulse conditions is demonstrated and analyzed for a high symmetry ladder polymer where contributions from coherent parametric mixing, excitons, and bipolarons are observed. The different timescales associated with various mechanisms for index of refraction and absorption changes are discussed. The utilization of photo-induced changes occurring on widely different timescales is demonstrated in the realization of efficient second harmonic generation by quasi- phase matching. The role of chemical synthesis in engineering multi-functional materials is discussed.

Paper Details

Date Published: 15 June 1992
PDF: 13 pages
Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); doi: 10.1117/12.60389
Show Author Affiliations
Linda S. Sapochak, Univ. of Southern California (United States)
Malcolm R. McLean, Univ. of Southern California (United States)
Mai Chen, Univ. of Southern California (United States)
Larry Raymond Dalton, Univ. of Southern California (United States)
Luping Yu, Univ. of Chicago (United States)

Published in SPIE Proceedings Vol. 1665:
Liquid Crystal Materials, Devices, and Applications
Paul S. Drzaic; Uzi Efron, Editor(s)

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