1. RRI Digital Repository
  2. 07. Theoretical Physics
  3. Research Papers (TP)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2733
Full metadata record
DC FieldValueLanguage
dc.contributor.authorRao, Divakara K.-
dc.contributor.authorAnantha Ramakrishna, S.-
dc.contributor.authorGupta, P.K.-
dc.date.accessioned2007-06-11T09:56:44Z-
dc.date.available2007-06-11T09:56:44Z-
dc.date.issued2001-01-
dc.identifier.citationApplied Physisc B: Laser and Optics, 2001, Vol.72, p215-219en
dc.identifier.issn0946-2171-
dc.identifier.issn1432-0649 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/2733-
dc.descriptionRestricted Access.en
dc.description.abstractWe report the results of our studies on the nonlinear optical response of thin films of tetraphenyl porphyrin doped in boric acid glass for picosecond-duration pulses. The fluence-dependent transmission measurements show that the sample exhibits reverse saturation behavior at 532 nm and saturable absorber action at 683 nm. By fitting the nonlinear transmission data at these wavelengths to a rate equation model, values for CSe and CL the excited singlet and ground state cross sections were obtained. The large value (,8) for CSe/CL makes it a potential material for optical limiting at 532 nm, whereas at 683 nm the ratio CL/CSe,4.3. Intensity dependence of degenerate forward four-wave mixing at 683 nm was also investigated to establish the order and magnitude of the nonlinearity. The forward four-wave mixing signal at 683 nm showed a cubic dependence on the input intensity, establishing the third-order nonlinearity. A value of 4210-12 esu for the third-order susceptibility |L(3)| was estimated from the measured efficiency. The time response of the nonlinearity was measured by the pump-probe transmission experiment, resulting in a decay constant of about 1.8 ns for the repopulation of the ground singlet state at 683 nm.en
dc.format.extent5473954 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherSpringeren
dc.relation.urihttp://dx.doi.org/10.1007/s003400000393en
dc.rights2001 Springeren
dc.titleNonlinear optical studies in tetraphenyl-porphyrin-doped boric acid glass using picosecond pulsesen
dc.typeArticleen
Appears in Collections:Research Papers (TP)

Files in This Item:
File Description SizeFormat 
2001 Applied Physics -B V72 p 215.pdf
  Restricted Access		Restricted Access5.35 MBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.