New routes to large optical nonlinearities (Invited Paper)

Linda S. Sapochak; Malcolm R. McLean; Mai Chen; Larry Raymond Dalton; Luping Yu

doi:10.1117/12.60389

15 June 1992 New routes to large optical nonlinearities (Invited Paper)

Linda S. Sapochak, Malcolm R. McLean, Mai Chen, Larry Raymond Dalton, Luping Yu

Proceedings Volume 1665, Liquid Crystal Materials, Devices, and Applications; (1992) https://doi.org/10.1117/12.60389
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

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.

Citation Download Citation

Linda S. Sapochak, Malcolm R. McLean, Mai Chen, Larry Raymond Dalton, and Luping Yu "New routes to large optical nonlinearities (Invited Paper)", Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); https://doi.org/10.1117/12.60389

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