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dc.contributor.authorMOORE, ROBERTen
dc.contributor.authorPEROVA, TANIAen
dc.date.accessioned2010-01-27T16:50:10Z
dc.date.available2010-01-27T16:50:10Z
dc.date.issued2005en
dc.date.submitted2005en
dc.identifier.citationV.A. Tolmachev, T.S. Perova, E.V. Astrova, J.A. Pilyugina and R.A. Moore, Optical characteristics of ordinary and tunable 1D Si photonic crystals in the mid-infrared range, SPIE--The International Society for Optical Engineering, 5825, 2005, 85, 94en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/36487
dc.descriptionPUBLISHEDen
dc.description.abstractReflection spectra and photonic band gaps (PBGs) for periodic structures consisting of grooved Si infiltrated with nematic liquid crystals (LCs) E7 have been obtained experimentally and by simulation. Periodically grooved Si matrixes, with lattice periods ranging from 2 to 6 ?m, were fabricated using wet anisotropic etching of (110) Si in an alkaline solution. It is shown theoretically that a substantial shift of PBGs can be obtained when there is a homogeneous alignment of the liquid crystal molecules with respect to the Si walls and, therefore, a change in the LC's refractive index from no to ne during elctro-tuning can be expected. This effect is smaller during thermo-tuning effect when refractive index changed from no to, ni (isotropic LC phase). The simulated reflection spectra are in good agreement with experimental data obtained with a Digilab FTS 6000 FTIR spectrometer in conjunction with a UMA 500 infrared microscope. A shift of the PBG's edges by a factor Deltalambda/lambda=7% was predicted as a result of a thermo-tuning effect and ~10% as a results of electro-tuning effecten
dc.format.extent85en
dc.format.extent94en
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.relation.ispartofseriesSPIE--The International Society for Optical Engineeringen
dc.relation.ispartofseries5825en
dc.rightsYen
dc.subject1D photonic crystalsen
dc.subjectphotonic gap mapen
dc.subjectbirefringenceen
dc.subjectFTIR microscopyen
dc.subjectnematic liquid crystalsen
dc.titleOptical characteristics of ordinary and tunable 1D Si photonic crystals in the mid-infrared rangeen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/rmooreen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/perovaten
dc.identifier.rssinternalid26972en
dc.identifier.doihttp://dx.doi.org/10.1117/12.607252en
dc.identifier.rssurihttp://dx.doi.org/10.1117/12.607252


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