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dc.contributor.authorMiah, MI
dc.date.accessioned2017-05-03T11:46:50Z
dc.date.available2017-05-03T11:46:50Z
dc.date.issued2010
dc.date.modified2010-10-06T06:55:40Z
dc.identifier.issn0254-0584
dc.identifier.doi10.1016/j.matchemphys.2009.09.013
dc.identifier.urihttp://hdl.handle.net/10072/34408
dc.description.abstractLayered semiconductor compound CdI2 has been grown with the Bridgman technique and studied by nonlinear transmittance spectroscopy. The optical absorption in CdI2 shows a nonlinear transmission of the incident laser power (P0) within a lower power limit. The transmission, however, is found to saturate at high powers, giving a clamped output. The value of the incident power (P0C) at which clamping starts is also found to depend on the crystal temperature (TL). The values of POC ranges from 55 to 65 MW cm-2 for TL = 4.2-180 K. The dynamic range (DR) as a function of TL is calculated and the values are found to range from DR = 2 to 1.6. The optical limiting mechanisms are discussed. The two-photon absorption (TPA) coefficient (ߩ of the optical nonlinear process in CdI2 is estimated. The values are found to be within a range from ߠ= 47 to 25 cm GW-1 and be decreasing with increasing TL. As expected for the TPA process, the experimental data within a certain range follows the linear relation: log (P0/PT) = AG + O(P0 - PT), where PT is the transmitted power, AG is the absorbance of the ground state and O is a constant depending on the absorption cross-section and the relaxation time. The values of AG and O estimated from the fits to the measured data vary with TL. The findings resulting from this investigation might have potential applications in optical sensors protection.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeSwitzerland
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom402
dc.relation.ispartofpageto405
dc.relation.ispartofissue3
dc.relation.ispartofjournalMaterials Chemistry and Physics
dc.relation.ispartofvolume119
dc.rights.retentionY
dc.subject.fieldofresearchMacromolecular and materials chemistry
dc.subject.fieldofresearchPhysical properties of materials
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchcode3403
dc.subject.fieldofresearchcode340305
dc.subject.fieldofresearchcode4016
dc.subject.fieldofresearchcode4018
dc.titleNonlinear optical activity in Bridgman growth layered compounds
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.date.issued2010
gro.hasfulltextNo Full Text
gro.griffith.authorMiah, Mohammad I.


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