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Title:Design, Fabrication, and Characterization of Terahertz Quantum Cascade Lasers
Author(s):Petschke, Adam Christopher
Doctoral Committee Chair(s):Chuang, Shun-Lien
Department / Program:Electrical and Computer Engineering
Discipline:Electrical and Computer Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Electronics and Electrical
Abstract:We also perform an experimental study of the role of the substrate on the optical and electrical properties. We find that the effect of the substrate thickness on the laser performance is dependent on other waveguide parameters. In particular, if the plasma layer is thick enough, the role of the substrate should be minimal. We use two-dimensional finite element modeling (FEM) to determine the threshold material gain coefficient and compare it to the experimental results of the threshold current density. We find that the threshold current density is roughly constant until the substrate thickness becomes smaller than 150 microm.
Issue Date:2009
Description:83 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.
Other Identifier(s):(MiAaPQ)AAI3392434
Date Available in IDEALS:2015-09-25
Date Deposited:2009

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