Tetrahedral framework of inverse opal photonic crystals defines the optical response and photonic band gap

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dc.contributor.author Lonergan, Alex
dc.contributor.author McNulty, David
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-09-07T11:33:14Z
dc.date.available 2018-09-07T11:33:14Z
dc.date.issued 2018-09-08
dc.identifier.citation Lonergan, A., McNulty, D. and O'Dwyer, C. (2018) 'Tetrahedral framework of inverse opal photonic crystals defines the optical response and photonic band gap', Journal of Applied Physics, 124(9), 095106 (10 pp). doi: 10.1063/1.5033367 en
dc.identifier.volume 124 en
dc.identifier.startpage 095106-1 en
dc.identifier.endpage 095106-10 en
dc.identifier.issn 0021-8979
dc.identifier.issn 1089-7550
dc.identifier.uri http://hdl.handle.net/10468/6735
dc.identifier.doi 10.1063/1.5033367
dc.description.abstract By forming anatase TiO2 inverse opals by infiltration of an opal photonic crystal, we demonstrate that the optical response and angle-resolved blue-shift of the band-gap of the inverse opal structure are defined by a particular three-dimensional structure of the infilled voids. The optical structure of TiO2 inverse opals usually displays significant deviation from its physical structure and from the theoretically predicted position of the photonic band-gap. Following rigorous structural characterization of the parent opal template and TiO2 inverse opals, alternative explanations for the signature of optical transmission through inverse opals are proposed. These approaches posit that, for light-matter interaction, an inverse opal is not precisely the inverse of an opal. Accurate parameters for the structure and material properties can be obtained by invoking a Bragg FCC selection rule-forbidden (-211) plane, which is not a realistic model for diffraction in the IO. Alternatively, by assuming optical interactions with just the periodic arrangement of tetrahedral filled interstitial sites in the structure of the inverse opal, a complete reconciliation with the spectral blue-shift with the angle, photonic band gap, and material parameters is obtained when a reduced unit cell is defined based on interstitial void filling. The analysis suggests a reduced interplanar spacing (d = 1/√3 D, for pore diameter D), based on the actual structure of an inverse opal in general, rather than a definition based on the inverse of an FCC packed opal. This approach provides an accurate and general description for predicting the spectral response and material parameters of ordered inverse opal photonic crystal materials. en
dc.description.sponsorship Irish Research Council (Government of Ireland Postgraduate Scholarship under Award No. GOIPG/2016/946); en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.uri https://aip.scitation.org/doi/10.1063/1.5033367
dc.rights © 2018, AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Journal of Applied Physics 2018 124:9 and may be found at https://doi.org/10.1063/1.5033367 en
dc.subject Crystal structure en
dc.subject Nanostructured materials en
dc.subject Photonics en
dc.subject Electron microscopy en
dc.subject TiO2 en
dc.subject Titanium dioxide en
dc.subject Photonic crystals en
dc.title Tetrahedral framework of inverse opal photonic crystals defines the optical response and photonic band gap en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: c.odwyer@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-09-06T15:07:20Z
dc.description.version Accepted Version en
dc.internal.rssid 452428572
dc.contributor.funder Irish Research Council en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Applied Physics en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/13/TIDA/E2761/IE/LiONSKIN - Moldable Li-ion battery outer skin for electronic devices/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/15/TIDA/2893/IE/Advanced Battery Materials for High Volumetric Energy Density Li-ion Batteries for Remote Off-Grid Power/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/ en

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