1. RRI Digital Repository
  2. 05. Light and Matter Physics
  3. Research Papers (LAMP)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4725
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSengupta, P.-
dc.contributor.authorBalaji, J.-
dc.contributor.authorBanerjee, Subhashish-
dc.contributor.authorPhilip, Reji-
dc.contributor.authorKumar, G.R.-
dc.contributor.authorMaiti, S.-
dc.date.accessioned2012-06-19T03:45:41Z-
dc.date.available2012-06-19T03:45:41Z-
dc.date.issued2000-06-
dc.identifier.citationJournal of Chemical Physics, 2000, Vol.112, p9201-9205en
dc.identifier.issn0021-9606-
dc.identifier.issn1089-7690-
dc.identifier.urihttp://hdl.handle.net/2289/4725-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractWe develop a method for measuring absolute two-photon absorption cross sections (σ2) and employ it to determine the σ2 of Rhodamine-6G in methanol (16.2+/-2.4 GM at 806 nm). Our measurement calibrates the relative excitation spectrum previously reported for this chromophore. The method is based on our derivation of an analytical expression describing the transmission of Gaussian laser pulses through a two-photon absorbing medium. The expression is valid for arbitrary absorber thickness, at all distances from the focus. This generalizes the prevalent ``z-scan'' (translation of the sample along the beam direction) technique for measuring two-photon absorbance, removing the requirements of a ``thin'' (thickness << Rayleigh range of the focused laser beam) sample and of placing the sample at the focus. This leads to an improvement of the sensitivity of the technique by over two orders of magnitude, enabling measurement of the two-photon absorption cross sections of even weakly absorbing specimens at moderate intensities. The results are significant for applications such as nonlinear microscopy, optical data storage and optical power limiting.en
dc.language.isoenen
dc.publisherAmerican Institute of Physicsen
dc.relation.urihttp://dx.doi.org/10.1063/1.481540en
dc.relation.urihttp://adsabs.harvard.edu/abs/2000JChPh.112.9201Sen
dc.rights2000 American Institute of Physicsen
dc.titleSensitive measurement of absolute two-photon absorption cross sectionsen
dc.typeArticleen
Appears in Collections:Research Papers (LAMP)

Files in This Item:
File Description SizeFormat 
2000_JChemPhys_V112_p9201.pdf
  Restricted Access		Restricted Access140.96 kBAdobe 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.