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oai:www.ideals.illinois.edu:2142/69327 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Meehan, Kathleen 2014-12-15T19:05:05Z 2014-12-15T19:05:05Z 10000-01-01 1985 1985 The effects of thermal annealing ((TURN)900(DEGREES)C) on quantum-well laser diode properties are investigated. The shift to higher energies caused by inter-diffusion of Al and Ga at the quantum-well interfaces in modeled by a modified Poschl-Teller potential. The interdiffusion coefficient D(Al-Ga) is found to be on the order of 1 x 10('-18) cm('2)/s at 900(DEGREES)C. Diffusion of Zn or Si has been found to cause interdiffusion of both of the Column III constituents (Al and Ga) and possibly both of the Column V constituents (P and As). This behavior, which yields layer disordering, occurs at lower temperatures than the temperature required for ordinary thermal disordering. With proper masking techniques, the layer intermixing (i.e., Al-Ga interdiffusion in Al(,x)Ga(,1-x)As-GaAs quantum-well heterostructures) can be accomplished selectively, thus raising the effective band gap of the diffused region. This process has been successfully used to define stripe-geometry buried heterostructure laser diodes. Made available in DSpace on 2014-12-15T19:05:05Z (GMT). No. of bitstreams: 1 8600266.pdf: 3052186 bytes, checksum: b18c348f98df502c559ae4ad6b548355 (MD5) Previous issue date: 1985 Embargo set by: Seth Robbins for item 69493 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 117 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985. http://hdl.handle.net/2142/69327 (UMI)AAI8600266 Engineering, Electronics and Electrical Wavelength Modification by Thermal Annealing and Stripe Geometry Definition by Impurity-Induced Disordering in Quantum-Well Laser Diodes (Diffusion, Gallium-Arsenide, Iii-v Semiconductors) text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.