Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/9437
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dc.contributor.authorGallego-Gómez, Francisco-
dc.contributor.authorMonte, Francisco del-
dc.contributor.authorMeerholz, Klaus-
dc.date.accessioned2009-01-05T12:32:25Z-
dc.date.available2009-01-05T12:32:25Z-
dc.date.issued2008-05-04-
dc.identifier.citationNature Materials 7(6): 490-497 (2008)en_US
dc.identifier.issn1476-1122-
dc.identifier.urihttp://hdl.handle.net/10261/9437-
dc.description8 pages, 5 figures.-- PMID: 18454152 [PubMed].-- Supplementary information (Suppl. figures S1-S5) available at: http://www.nature.com/nmat/journal/v7/n6/suppinfo/nmat2186_S1.htmlen_US
dc.descriptionPrinted version published in Jun 2008.-
dc.description.abstractOrganic holographic materials are pursued as versatile and cheap data-storage materials. It is generally assumed that under steady-state conditions, only photorefractive holographic media exhibit a non-local response to a light-intensity pattern, which results in an asymmetric two-beam coupling or 'gain', where intensity is transferred from one beam to the other as a measure of writing efficiency. Here, we demonstrate non-local holographic recording in a non-photorefractive material. We demonstrate that reversible photoisomerization gratings recorded in a non-photorefractive azo-based material exhibit large optical gain coefficients beyond 1,000 cm-1, even for polarization gratings. The grating characteristics differ markedly from classical photorefractive features, but can be modelled by considering the influence of the Poynting vector on the photoisomerization. The external control of the Poynting vector enables manipulation of the gain coefficient, including its sign (the direction of energy exchange), a novel phenomenon we refer to as 'gain steering'. A very high sensitivity of about 100 cm2 J-1 was achieved. This high sensitivity, combined with a high spatial resolution, suggests a great technical advantage for applications in image processing and phase conjugation.en_US
dc.description.sponsorshipF.d.M. thanks MAT2006-02394 for financial support.en_US
dc.format.extent456476 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherNature Publishing Groupen_US
dc.rightsclosedAccessen_US
dc.subjectPolymersen_US
dc.subjectOptical, photonic and optoelectronic materialsen_US
dc.subjectOrganic holographic materialsen_US
dc.subjectNon-photorefractive materialsen_US
dc.subjectReversible photoisomerization gratingsen_US
dc.subjectGain steeringen_US
dc.titleOptical gain by a simple photoisomerization processen_US
dc.typeartículoen_US
dc.identifier.doi10.1038/nmat2186-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1038/nmat2186en_US
dc.identifier.e-issn1476-4660-
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
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