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oai:www.ideals.illinois.edu:2142/66251 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Durschlag, Mark Stuart 2014-12-12T20:55:22Z 2014-12-12T20:55:22Z 10000-01-01 1981 1981 The performance in a cw optically pumped far infrared (fir) laser of a hybrid metal mesh-dielectric mirror consisting of an assembly of thin metallic and semiconducting films is evaluated. Its construction is described and an overview of theoretical approaches predicting its optical properties is outlined. From the general model which best agrees with the experimentally determined transmission a simplified model is derived and shown to maintain sufficient accuracy to warrent its further utilization. Ultra-thin semiconducting heterostructures are also examined using fir techniques. In particular, it is shown that by fitting a calculated reflectivity based on a simple classical model to the fir reflectivity obtained experimentally, both electrical (free carrier concentration, mobility) and lattice (polar phonon frequencies) parameters can be obtained with reasonable accuracy. Made available in DSpace on 2014-12-12T20:55:22Z (GMT). No. of bitstreams: 1 8127582.pdf: 3857509 bytes, checksum: 592560c1f76c9a1e2e27b3355a2d4596 (MD5) Previous issue date: 1981 Embargo set by: Seth Robbins for item 66430 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 119 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981. http://hdl.handle.net/2142/66251 (UMI)AAI8127582 eng Physics, Condensed Matter Optical Characterization of Thin Metallic and Semiconducting Films in the Far Infrared text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.