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dc.contributor.authorO'Faolain, Liam
dc.contributor.authorSchulz, Sebastian Andreas
dc.contributor.authorBeggs, Daryl Matthew
dc.contributor.authorWhite, Tom P
dc.contributor.authorSpasenovic, M.
dc.contributor.authorKuipers, L.
dc.contributor.authorMorichetti, F.
dc.contributor.authorMelloni, A.
dc.contributor.authorMazoyer, S.
dc.contributor.authorHugonin, J. P.
dc.contributor.authorLalanne, P.
dc.contributor.authorKrauss, Thomas Fraser
dc.identifier.citationO'Faolain , L , Schulz , S A , Beggs , D M , White , T P , Spasenovic , M , Kuipers , L , Morichetti , F , Melloni , A , Mazoyer , S , Hugonin , J P , Lalanne , P & Krauss , T F 2010 , ' Loss engineered slow light waveguides ' , Optics Express , vol. 18 , no. 26 , pp. 27627-27638 .
dc.identifier.otherPURE: 5569773
dc.identifier.otherPURE UUID: e0a209d9-46a5-4720-9d04-b3f464e5eae2
dc.identifier.otherWOS: 000285584200099
dc.identifier.otherScopus: 78650539341
dc.identifier.otherORCID: /0000-0001-5169-0337/work/42767156
dc.description.abstractSlow light devices such as photonic crystal waveguides (PhCW) and coupled resonator optical waveguides (CROW) have much promise for optical signal processing applications and a number of successful demonstrations underpinning this promise have already been made. Most of these applications are limited by propagation losses, especially for higher group indices. These losses are caused by technological imperfections ("extrinsic loss") that cause scattering of light from the waveguide mode. The relationship between this loss and the group velocity is complex and until now has not been fully understood. Here, we present a comprehensive explanation of the extrinsic loss mechanisms in PhC waveguides and address some misconceptions surrounding loss and slow light that have arisen in recent years. We develop a theoretical model that accurately describes the loss spectra of PhC waveguides. One of the key insights of the model is that the entire hole contributes coherently to the scattering process, in contrast to previous models that added up the scattering from short sections incoherently. As a result, we have already realised waveguides with significantly lower losses than comparable photonic crystal waveguides as well as achieving propagation losses, in units of loss per unit time (dB/ns) that are even lower than those of state-of-the-art coupled resonator optical waveguides based on silicon photonic wires. The model will enable more advanced designs with further loss reduction within existing technological constraints. (C) 2010 Optical Society of America
dc.relation.ispartofOptics Expressen
dc.rights(c) 2010 OSA. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at
dc.subjectPhotonic crystalsen
dc.titleLoss engineered slow light waveguidesen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Commissionen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Microphotonics and Photonic Crystals Groupen
dc.description.statusPeer revieweden

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