Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3064
Full metadata record
DC FieldValueLanguage
dc.contributor.authorKumar, N.-
dc.contributor.authorPradhan, P.-
dc.contributor.authorJayannavar, A.M.-
dc.date.accessioned2007-06-21T09:01:58Z-
dc.date.available2007-06-21T09:01:58Z-
dc.date.issued1998-03-
dc.identifier.citationSuperlattices and Microstructures, 1998, Vol.23, p853-857en
dc.identifier.issn0749-6036-
dc.identifier.urihttp://hdl.handle.net/2289/3064-
dc.descriptionRestricted Access.en
dc.description.abstractLight-wave propagation in a randomly scattering but uniformly and coherently amplifying optical medium is analysed for the statistics of the coefficient of reflectionr(l) that may now exceed unity, hence super-reflection. Uniform coherent amplification is introduced phenomenologically through a constant negative imaginary part added to the otherwise real dielectric constant of the medium, assumed random. The probability densityp(r,l) for the reflection coefficient, calculated in a random phase approximation, tends to an asymptotic formp(r, ∞) having a long tail with divergent mean left angle bracketrright-pointing angle bracket in the limit of weak disorder but with the sample lengthl(measured in units of the localization length in the absence of gain) much greater-than1. This super-reflection is attributed to a synergetic effect of localization and coherent amplification, as distinct from the classically diffusive path-length prolongation. Our treatment is based on the invariant-imbedding method for the one-channel (single-mode) case, and is in the spirit of the scattering approach to wave transport as pioneered by Landauer. Generalization to the multichannel case is pointed out. Relevance to random lasers, and some recent results for a sub-meanfree path sample are also briefly discussed.en
dc.format.extent104644 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.relation.urihttp://dx.doi.org/10.1006/spmi.1997.0546en
dc.rights1998 Elsevier B.V.en
dc.subjectrandom laseren
dc.subjectlocalizationen
dc.subjectamplificationen
dc.subjectfluctuationsen
dc.titleCoherently amplifying random medium: Statistics of super-reflectionen
dc.typeArticleen
Appears in Collections:Research Papers (LAMP)

Files in This Item:
File Description SizeFormat 
1998 SaM 23 p853.pdf
  Restricted Access
Restricted Access102.19 kBAdobe PDFView/Open Request a copy


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