Q-factor optimization in photonic crystal nanobeam cavities based on elliptical nanopillars for refractive index sensing

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dc.contributor.authorMendoza-Castro, J. H.en
dc.contributor.authorVorobev, A. S.en
dc.contributor.authorIadanza, Simoneen
dc.contributor.authorLendl, B.en
dc.contributor.authorGrande, M.en
dc.contributor.authorO'Faolain, Liamen
dc.contributor.funderHorizon 2020en
dc.date.accessioned2023-12-15T10:22:04Z
dc.date.available2023-12-15T10:22:04Z
dc.date.issued2023-09-04en
dc.description.abstractLabel free sensing applications based on refractive index (RI) require new encapsulated high Q-factor cavity designs, that can overcome the inaccuracies inherent in the fabrication process. The required fine tuning of the current RI sensors based on PhCNC makes them highly sensitive to disparities found in the fabrication. These imperfections can dramatically decrease the performance, in designs which possess strict features along the whole design parameters space [1]–[4]. To limit this behaviour, we propose elliptically shaped nanopillars in which the optimum zone of operation is extended. The schematics of the PhCNC and the fabricated device considered in this work are shown in Fig. 1(a) and (b), respectively. Fig. 1(a), depicts three different cross sections of the PhCNC immersed in different analyte refractive index (nA) that can vary from 1 (refractive index that can be considered for gases) to 1.45 (SiO 2 ). The vertical widths (Wy(i)) of the dielectric pillars are quadratically modulated (Wy(i)=Wy(0)+i2(Wy(imax)−Wy(0))/imax2) , from the center to both sides where i increases from 0 to imax (see Fig. 1(a)-left). Fig. 1(c) shows the behavior of the Q-factor calculated by means of 3D-FDTD simulations [5], against different nanopillar widths Wx in two extreme shape cases: rectangular and elliptical ones.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMendoza-Castro, J. H., Vorobev, A. S.,Iadanza, S., Lendl, B., Grande, M. and O'Faolain, L. (2023) 'Q-factor optimization in photonic crystal nanobeam cavities based on elliptical nanopillars for refractive index sensing', 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 26-30 June, pp. 1-1. doi: 10.1109/CLEO/Europe-EQEC57999.2023.10232053en
dc.identifier.doihttps://doi.org/10.1109/cleo/europe-eqec57999.2023.10232053en
dc.identifier.eissn2833-1052en
dc.identifier.endpage1en
dc.identifier.isbn979-8-3503-4599-5en
dc.identifier.isbn979-8-3503-4600-8en
dc.identifier.issn2639-5452en
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/15323
dc.language.isoenen
dc.publisherIEEEen
dc.relation.ispartof2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::MSCA-ITN-EJD/860808/EU/European Joint Doctorate Programme on Optical Sensing using Advanced Photo-Induced Effects/OPTAPHIen
dc.rights© 2023, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.en
dc.subjectQ-factoren
dc.subjectFabricationen
dc.subjectSilicon compoundsen
dc.subjectPerformance evaluationen
dc.subjectShapeen
dc.subjectRefractive indexen
dc.subjectPhotonic crystalsen
dc.titleQ-factor optimization in photonic crystal nanobeam cavities based on elliptical nanopillars for refractive index sensingen
dc.typeConference itemen
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