Nonlinear optical response of poly(p-phenylenevinylene): Role of photogenerated gap states

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Nonlinear optical response of poly(p-phenylenevinylene): Role of photogenerated gap states

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Title: Nonlinear optical response of poly(p-phenylenevinylene): Role of photogenerated gap states
Author: NAMPOOTHIRI, AVV; SINGH, BP; KUMAR, GR
Abstract: Third order nonlinear optical properties of Poly(p-phenylenevinylene) have been investigated at 532 nm using degenerate four wave mixing and Z-scan techniques. Intensity dependent absorption has been attributed to photogenerated gap states arising from one-photon pi-pi* transition, and the coefficient of nonlinear absorption has been estimated. The observed intensity dependence of the degenerate four wave mixing signal has been explained using four-level model involving gap state transitions.
URI: http://dx.doi.org/10.1142/S0218863598000429
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12926
http://hdl.handle.net/10054/12926
Date: 1998


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