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Article: Modeling the optical properties of sapphire (α-Al 2O 3)

TitleModeling the optical properties of sapphire (α-Al 2O 3)
Authors
Issue Date1998
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/optcom
Citation
Optics Communications, 1998, v. 157 n. 1-6, p. 72-76 How to Cite?
AbstractOptical properties of sapphire α-Al 2O 3 for parallel and perpendicular polarization are modeled in the spectral range 0.2-20 eV. The modified Lorentz model with frequency dependent damping, which enables adjusting the broadening function over a range of functions with similar kernels but different wings, is employed. Due to greater flexibility of the employed model, we obtain excellent agreement with experimental data for both polarizations in the entire investigated spectral range with a total of 8 oscillators, i.e. 33 parameters. In the previous study reporting modeling of the optical constants of sapphire in the range 1-30 eV using conventional damped harmonic oscillator model, 13 oscillators with a total of 40 parameters were used. Good agreement with the imaginary part but significant discrepancies for the real part of the dielectric function obtained in the previous study were attributed to possible inconsistencies in the experimental data, based on the fact that a damped harmonic oscillator model automatically satisfies KK relations. However, we obtain good agreement with experimental data for both real and imaginary parts of the dielectric function using our model. Therefore, we conclude that the main reason for the discrepancy in the previous study is inadequacy of the assumption of Lorentzian line broadening. © 1998 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/174879
ISSN
2015 Impact Factor: 1.48
2015 SCImago Journal Rankings: 0.778
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDjurišić, ABen_US
dc.contributor.authorLi, EHen_US
dc.date.accessioned2012-11-26T08:47:56Z-
dc.date.available2012-11-26T08:47:56Z-
dc.date.issued1998en_US
dc.identifier.citationOptics Communications, 1998, v. 157 n. 1-6, p. 72-76en_US
dc.identifier.issn0030-4018en_US
dc.identifier.urihttp://hdl.handle.net/10722/174879-
dc.description.abstractOptical properties of sapphire α-Al 2O 3 for parallel and perpendicular polarization are modeled in the spectral range 0.2-20 eV. The modified Lorentz model with frequency dependent damping, which enables adjusting the broadening function over a range of functions with similar kernels but different wings, is employed. Due to greater flexibility of the employed model, we obtain excellent agreement with experimental data for both polarizations in the entire investigated spectral range with a total of 8 oscillators, i.e. 33 parameters. In the previous study reporting modeling of the optical constants of sapphire in the range 1-30 eV using conventional damped harmonic oscillator model, 13 oscillators with a total of 40 parameters were used. Good agreement with the imaginary part but significant discrepancies for the real part of the dielectric function obtained in the previous study were attributed to possible inconsistencies in the experimental data, based on the fact that a damped harmonic oscillator model automatically satisfies KK relations. However, we obtain good agreement with experimental data for both real and imaginary parts of the dielectric function using our model. Therefore, we conclude that the main reason for the discrepancy in the previous study is inadequacy of the assumption of Lorentzian line broadening. © 1998 Elsevier Science B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/optcomen_US
dc.relation.ispartofOptics Communicationsen_US
dc.titleModeling the optical properties of sapphire (α-Al 2O 3)en_US
dc.typeArticleen_US
dc.identifier.emailDjurišić, AB: dalek@hku.hken_US
dc.identifier.authorityDjurišić, AB=rp00690en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0030-4018(98)00503-3-
dc.identifier.scopuseid_2-s2.0-0343004291en_US
dc.identifier.hkuros45864-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0343004291&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume157en_US
dc.identifier.issue1-6en_US
dc.identifier.spage72en_US
dc.identifier.epage76en_US
dc.identifier.isiWOS:000077541700014-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_US
dc.identifier.scopusauthoridLi, EH=7201410087en_US

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