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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4373
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dc.contributor.authorShalini, M.-
dc.contributor.authorSharma, Divya-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorMathur, Deepak-
dc.contributor.authorRamachandran, Hema-
dc.contributor.authorKumar, N.-
dc.date.accessioned2012-03-28T04:08:43Z-
dc.date.available2012-03-28T04:08:43Z-
dc.date.issued2012-01-
dc.identifier.citationEuropean Physical Journal D, 2012, Vol.66, p30en
dc.identifier.issn1434-6060-
dc.identifier.issn1434-6079 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/4373-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractWe present a semi-phenomenological treatment of light transmission through and its reflection from a ferrofluid which we regard as a magnetically tunable system of dense random dielectric scatterers with dissipation. Partial spatial ordering is introduced by the application of a transverse magnetic field that superimposes a periodic modulation on the dielectric randomness. This causes Bragg scattering that effectively enhances the scattering due to the disorder alone, and thus reduces the elastic mean free path towards Anderson localization. A theoretical treatment, based on invariant imbedding, gives a simultaneous decrease of the transmission and the reflection without change of incident linear polarisation as the spatial order is tuned magnetically to the Bragg condition, namely the light wave vector being equal to half the Bragg vector (Q). Our experimental observations are in qualitative agreement with these results. We have also given expressions for the transit (sojourn) time of the light, and for the light energy stored in the random medium under a steady illumination. The ferrofluid thus provides an interesting physical realization of effectively a “Lossy Anderson-Bragg” (LAB) cavity with which to study the effect of interplay of the spatial disorder, partial order and the dissipation on light transport. Given current interests in the light propagation, optical limiting and the storage of light in ferrofluids, the present work seems topical.en
dc.language.isoenen
dc.publisherEDP Sciences /Springeren
dc.relation.urihttp://arxiv.org/abs/1104.4169en
dc.relation.urihttp://dx.doi.org/10.1140/epjd/e2011-20368-8en
dc.rights2012 EDP Sciences /Springeren
dc.subjectOptical Phenomenaen
dc.subjectPhotonicsen
dc.titleLight scattering from a magnetically tunable dense random medium with weak dissipation : ferrofluiden
dc.typeArticleen
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