Nonlinear Optical Properties of Novel Forms of Enriched Carbon Disulfide

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dc.contributor.advisorJohnson, Anthony M
dc.contributor.authorEdziah, Raymond
dc.contributor.departmentPhysics
dc.contributor.programPhysics, Applied
dc.date.accessioned2015-10-14T03:13:47Z
dc.date.available2015-10-14T03:13:47Z
dc.date.issued2010-01-01
dc.description.abstractThe ultimate goal of designing molecules with large third-order nonlinearities is to incorporate them into optical switching and limiting devices. To achieve this, the molecules must have large and fast optical nonlinearities. We undertook picosecond and femtosecond studies of carbon disulfide (CS2) enriched with sulfur, selenium, cadmium telluride nanoparticles and 2-methyl-4-nitroaniline (MNA) for enhanced optical nonlinearities, using the Z-scan technique. In this method, a sample is scanned along the optic axis (chosen as the z- direction) in the focal region of a single focused laser beam. The intensity transmitted through the region with an aperture (nonlinear refraction) or without an aperture (nonlinear absorption) in the far field is recorded as a function of the sample position. Due to the high intensity of the electromagnetic field in this region, the sample tends to behave as a lens of variable focal length and can focus or defocus the beam depending on the sign of the nonlinearity. Our measurements with a 130-fs source indicate that the nonlinear absorption coefficient of CS2 was enhanced by more than two orders of magnitude (over pure CS2) through sulfur and selenium enrichment; while their nonlinear refractive indices experienced minimal change. Enhanced nonlinearities of enriched CS2 molecules may be harnessed for sensor applications.
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dc.identifierdoi:10.13016/M2CM21
dc.identifier.other10244
dc.identifier.urihttp://hdl.handle.net/11603/1071
dc.languageen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Theses and Dissertations Collection
dc.relation.ispartofUMBC Graduate School Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofUMBC Physics Department Collection
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please see http://aok.lib.umbc.edu/specoll/repro.php or contact Special Collections at speccoll(at)umbc.edu.
dc.sourceOriginal File Name: Edziah_umbc_0434D_10244.pdf
dc.subjectcarbon disulfide
dc.subjectenriched carbon disulfide
dc.subjectnonliear absorption coefficient
dc.subjectoptical limiters
dc.subjectoptical limiting
dc.subjectZ-scan
dc.titleNonlinear Optical Properties of Novel Forms of Enriched Carbon Disulfide
dc.typeText
dcterms.accessRightsAccess limited to the UMBC community. Item may possibly be obtained via Interlibrary Loan through a local library, pending author/copyright holder's permission.

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