Third-order nonlinearity and optical limiting studies in phosphorus (V) porphyrins with charge transfer states

Prem Kiran, P. ; Raghunath Reddy, D. ; Maiya, Bhaskar G. ; Narayana Rao, D. (2003) Third-order nonlinearity and optical limiting studies in phosphorus (V) porphyrins with charge transfer states Optical Materials, 21 (1-3). pp. 565-568. ISSN 0925-3467

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09253...

Related URL: http://dx.doi.org/10.1016/S0925-3467(02)00201-X

Abstract

Enhancement in the third-order nonlinearity X(3), nonlinear absorption and optical limiting threshold with the introduction of charge transfer (CT) states are observed in a new class of azoarene phosphorus (V) porphyrins. Introduction of axial azoarene groups into the phosphorus porphyrin structure led to a rise in the measured <y> values. Faster intersystem crossing from CT states to triplet and excited state absorption from the triplet states contribute to the enhancement of nonlinear absorption thereby reducing the optical limiting threshold by a factor of 2.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Optical Limiting; Excited State Absorption; Intersystem Crossing; Porphyrin
ID Code:32173
Deposited On:31 Mar 2011 10:34
Last Modified:10 Aug 2011 06:09

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