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Brown, Frederick C. Bachrach, Robert Zelman 2011-07-11T17:18:39Z 2011-07-11T17:18:39Z 10000-01-01 1969 A thin film fabrication technique resulting in a considerable reduction in strain has been developed and has facilitated the optical and magneto-optical experiments on the Thallous Halides. The strain reduction achieved has revealed optical spectra of exceptional sharpness, Previously undiscovered absorption features have appeared and exciton effects have been established. A variety of experiments were performed to clarify the nature of the structure associated with the first exciton peak. Intrinsic structure and structure due to strain lifted degeneracy has been identified. These experiments also provided criteria for evaluating the films. Analysis of the optical absorption spectra to yield the optical constants was performed and the spectra correlated with the magnetoabsorption results. Both Faraday rotation and direct magneto-absorption experiments were performed. Analysis of the experiments yielded exciton binding energies, effective reduced and carrier masses, effective g values, the energy gaps, peak positions and spin orbit splittings. A phonon sideband to the first exciton peak has been found and its character extensively investigated. The sideband is believed to arise from an exciton-longitudinal optical phonon coupled state. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T17:18:39Z No. of bitstreams: 1 1969_bachrach.pdf: 3845948 bytes, checksum: 13b3a0ee568c67213c16d3a2b790618b (MD5) Made available in DSpace on 2011-07-11T17:18:39Z (GMT). No. of bitstreams: 1 1969_bachrach.pdf: 3845948 bytes, checksum: 13b3a0ee568c67213c16d3a2b790618b (MD5) Previous issue date: 1969 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T17:18:39Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:33:19-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6075018 http://hdl.handle.net/2142/25761 en 1969 Robert Zelman Bachrach excitons thallous halides thin film fabrication technique magneto optical experiments Excitons in the thallous halides Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.