Phase holographic studies of the conductivity of Fe-doped LiNbO¿

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dc.contributor.advisorRabson, Thomas A.en_US
dc.contributor.committeeMemberKim, Dae M.en_US
dc.contributor.committeeMemberTittel, Frank K.en_US
dc.contributor.committeeMemberWilson, William L.en_US
dc.creatorBienvenu, Michael Patricken_US
dc.date.accessioned2018-12-18T21:21:07Zen_US
dc.date.available2018-12-18T21:21:07Zen_US
dc.date.issued1979en_US
dc.description.abstractThe writing process involved in volume phase holographic storage in LiNbO3 has been extensively studied, but no quantitative work exists concerning the decay of holograms. Since direct electrical conductivity measurements are difficult, if not impossible, decay rate measurements can provide an accurate figure for the material's conductivity. A coupled-wave theory developed by Kogelnik is presented describing diffraction by a phase grating with unslated fringes in a lossy medium. Next, a dynamic theory of hologram grating developed by Kim is presented. Using classical E-M theory, the hologram decay is predicted to be a sum of exponentials. Experimental data on writing and decay processes is presented which agree well with Kim's theoretical predictions, but which differ markedly from the expected decay behaviour. An excellent fit to the experimental decay curves was obtained by assuming a time dependent conductivity of the form a(t) = CJQ + e. The data show that T, the time constant involved, varies with the iron doping level in the crystal. A model is proposed to explain the phenomenon, involving metastable trapping centers releasing electrons into the conduction band.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent106 ppen_US
dc.identifier.callnoTHESIS E.E. 1979 BIENVENUen_US
dc.identifier.citationBienvenu, Michael Patrick. "Phase holographic studies of the conductivity of Fe-doped LiNbO¿." (1979) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104333">https://hdl.handle.net/1911/104333</a>.en_US
dc.identifier.digitalRICE1965en_US
dc.identifier.urihttps://hdl.handle.net/1911/104333en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titlePhase holographic studies of the conductivity of Fe-doped LiNbO¿en_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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