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

Authors
Nampoothiri, AVV Singh, BP Kumar, GR
Citation
Avv. Nampoothiri et al., Nonlinear optical response of poly(p-phenylenevinylene): Role of photogenerated gap states, J NONLIN OP, 7(4), 1998, pp. 571-579
Citations number
35
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
ISSN journal
02188635 → ACNP
Volume
7
Issue
4
Year of publication
1998
Pages
571 - 579
Database
ISI
SICI code
0218-8635(199812)7:4<571:NOROPR>2.0.ZU;2-V
Abstract
Third order nonlinear optical properties of Poly(p-phenylenevinylene) have been investigated at 532 nm using degenerate four wave mixing and Z-scan te chniques. Intensity dependent absorption has been attributed to photogenera ted gap states arising from one-photon pi-pi* transition, and the coefficie nt of nonlinear absorption has been estimated. The observed intensity depen dence of the degenerate four wave mixing signal has been explained using fo ur-level model involving gap state transitions.