Show simple item record

dc.contributor.authorMiah, M Idrish
dc.date.accessioned2017-05-03T13:15:14Z
dc.date.available2017-05-03T13:15:14Z
dc.date.issued2009
dc.date.modified2010-06-29T06:46:13Z
dc.identifier.issn0169-4332
dc.identifier.doi10.1016/j.apsusc.2009.09.005
dc.identifier.urihttp://hdl.handle.net/10072/30725
dc.description.abstractBecause the optically induced second harmonic generation (SHG) is prevented by symmetry in a centrosymmetric material, one needs to form noncentrosymmetric processes in order to observe the SHG. However, one of the efficient ways to enhance the noncentrosymmetricity of a material is to dope it with an appropriate impurity and amount. We grow Cu-doped CdI2 layered nanocrystal structures from the mixture of CdI2 and CuI using the standard Bridgman-Stockbarger method and investigate the nano-confined effects by studying the second-order optical effect via the measurements of SHG. The second-order susceptibility for the nanocrystals is calculated and the values at liquid helium temperature range from 0.38 to 0.83 pm V-1 for the thicknesses of 10-0.8 nm respectively. The size dependence demonstrates the nano-sized quantum-confined effect with a clear increase in the SHG with decreasing the thickness of the nanocrystal or crystal temperature. Since the local electron-phonon anharmonicity is described by third-order rank tensors in disordered systems, the SHG is very similar to that one introduced for the third-order optical susceptibility. It has been confirmed by observing the large photoluminescent yield of the pure crystals. The Raman scattering spectra taken for thin nanocrystals confirm the phonon modes originating from interlayer phonons crucially responsible for the observed effects. The obtained results show that the Cu-doped CdI2 layered nanocrystals are promising materials for applications in optoelectronic nano-devices.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom1472
dc.relation.ispartofpageto1475
dc.relation.ispartofissue5
dc.relation.ispartofjournalApplied Surface Science
dc.relation.ispartofvolume256
dc.rights.retentionY
dc.subject.fieldofresearchAtomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified
dc.subject.fieldofresearchcode020299
dc.titleSize effect on the SHG properties of Cu-doped CdI2 nanocrystals
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.date.issued2009
gro.hasfulltextNo Full Text
gro.griffith.authorMiah, Mohammad I.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record