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dc.contributor.authorBLAU, WERNERen
dc.date.accessioned2015-02-24T16:59:22Z
dc.date.available2015-02-24T16:59:22Z
dc.date.issued2014en
dc.date.submitted2014en
dc.identifier.citationWang, G., Zhang, S., Umran, F.A., (...), Blau, W.J., Wang, J., Tunable effective nonlinear refractive index of graphene dispersions during the distortion of spatial self-phase modulation, Applied Physics Letters, 104, 14, 2014, 141909-en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/73359
dc.descriptionPUBLISHEDen
dc.description.abstractSpatial self-phase modulation (SSPM) was observed directly when a focused He-Ne laser beam at 633 nm went through liquid-phase-exfoliated graphene dispersions. The diffraction pattern of SSPM was found to be distorted rapidly right after the incident beam horizontally passing through the dispersions, while no distortion for the vertically incident geometry. We show that the distortion is originated mainly from the non-axis-symmetrical thermal convections of the graphene nanosheets induced by laser heating, and the relative change of nonlinear refractive index can be determined by the ratio of the distortion angle to the half-cone angle. Therefore, the effective nonlinear refractive index of graphene dispersions can be tuned by changing the incident intensity and the temperature of the dispersions.en
dc.description.sponsorshipShanghai Pujiang Program 12PJ1409400. S.F.Z. thanks the STCSM (No. 12ZR1451800) and NSFC (No. 61308034). N.N.D. thanks the China Postdoctoral Science Foundation (2012M520049) and NSFC (No. 61308087). L.Z. thanks the fi- nancial supports from NSFC (No. 51072207) and STCSM (No. 10XD1404600). W.J.B. gratefully acknowledges the China National High-end Foreign Experts Program (No. GDJ20130491010) and Science Foundation Ireland (SFI, 12/IA/1306).en
dc.format.extent141909en
dc.language.isoenen
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseries104en
dc.relation.ispartofseries14en
dc.rightsYen
dc.subjectSpatial self-phase modulation (SSPM)en
dc.subject.lcshSpatial self-phase modulation (SSPM)en
dc.titleTunable effective nonlinear refractive index of graphene dispersions during the distortion of spatial self-phase modulationen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/wblauen
dc.identifier.rssinternalid101071en
dc.identifier.doihttp://dx.doi.org/10.1063/1.4871092en
dc.rights.ecaccessrightsopenAccess
dc.contributor.sponsorGrantNumber12/IA/1306en


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