Download or read book Native Oxidation of Selectively Disordered Aluminum Gallium Arsenide Quantum Well Heterostructures Deep Oxide Structures for High Performance Lasers and Waveguides written by Michael Ragan Krames and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Data are presented showing that "deep," device-quality native oxide structures can be formed in selected areas in $rm Alsb{x}Gasb{1-x}$As-GaAs quantum well heterostructure (QWH) crystals. The deep oxides are formed using a combination of improved area-selective impurity-induced layer disordering (IILD) and water vapor oxidation at an elevated temperature (525$spcirc$C). The resulting oxide extends from the QWH crystal surface into the lower confining layers, penetrating the active region and forming a deep, insulating, low-refractive-index structure with a smooth interface that is free of defects and dislocations. Data are presented on devices utilizing the large lateral index step provided by the deep oxide, including high performance AlGaAs-GaAs QWH stripe-geometry laser diodes, waveguides with low bend loss, and low-threshold curved-geometry lasers. These devices display tight routing capability and suggest compact, integrable geometries for reducing the real-estate requirements (and the cost) of the optoelectronic integrated circuits and for offering less constraint in circuit design.

Download or read book Native Oxidation of Selectivity Disordered Aluminum Gallim Arsenide Quantum Well Heterostructures written by Michael Ragan Krames and published by . This book was released on 1995 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1996 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Native oxide Masked Impurity induced Layer Disordering of Aluminum Gallium Arsenide Quantum Well Heterostructures and Superlattices written by Nada El-Zein and published by . This book was released on 1992 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selective Oxidation of Aluminum Bearing III V Semiconductors with Applications to Quantum Well Heterostructure Lasers written by Steven Andrew Maranowski and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present work, a water vapor oxidation process is used to convert high Al-composition $rm Alsb{x}Gasb{1-x}As and Insb{0.5}(Alsb{x}Gasb{1-x})sb{0.5}P$ to stable, device-quality native oxides. The insulating and low-refractive-index properties of the native oxide prove useful in the fabrication of quantum well heterostructure laser diodes. The rate of oxide formation is sensitive to oxidation temperature and time, crystal doping, and, most dramatically the aluminum composition of the oxidizing layer. The higher aluminum composition semiconductors oxidize more readily. Selective oxidation of quantum well heterostructure crystals is used to convert only the highest aluminum composition materials to the native oxide. In the layered heterostructures commonly used in today's optoelectronic devices, selective oxidation is a unique way to "bury" an insulating and low-refractive-index oxide both above and below semiconductor layers used in a device. This makes possible, as described here, an edge-emitting laser diode that is confined both optically and electrically by "buried" oxide layers above and below the active region. Selective oxidation of $rm Alsb{x}Gasb{1-x}As$ occurs at low enough temperatures $(400spcirc$C-500$spcirc$C) to be performed on a fully metallized laser diode without adversely affecting its electrical performance. Metallized laser diodes are oxidized from their exposed facets, resulting in edge-emitting devices with current-blocking window regions at the mirrors. The buried oxide "spike," which extends from the facet into the crystal, forms selectively in a region of high aluminum composition. The buried oxide removes the current injection from the facet region, protects the facet, and results in improved maximum output powers from the lasers. Finally, the ability to form low-index $rm(nsim1.55)$ layers of oxide between high-index semiconductor crystals facilitates the formation of high-index-contrast distributed Bragg reflecting (DBR) mirrors. The properties of these mirrors and their applications to vertical cavity surface emitting lasers and edge-emitting lasers are described.

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aluminum Gallium Arsenide Gallium Arsenide Indium Gallium Arsenide Indium Arsenide Quantum Dot Coupled to Quantum Well Heterostructure Lasers by Low Pressure Metalorganic Chemical Vapor Deposition written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Native Defect Enhanced Inter diffusion in Aluminum Gallium Arsenide Quantum Well Heterostructures written by Suresh Seshadri and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Growth of Aluminum Gallium Arsenide gallium Arsenide Graded Barrier Quantum Well Heterostructure Lasers with Various Buffer Layer Structures by Metalorganic Chemical Vapor Deposition written by Michael Eugene Givens and published by . This book was released on 1988 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Disorder Effects in Aluminum Gallium Arsenide Quantum well Heterostructures written by Wyn Davis Laidig and published by . This book was released on 1981 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Characteristics of Aluminum Gallium Arsenide gallium Arsenide Quantum Well Heterostructure P n Junction Lasers Grown on Silicon written by Douglas Carleton Hall and published by . This book was released on 1988 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gain guided Aluminum Gallium Arsenide gallium Arsenide Quantum well Heterostructure Lasers Fabricated by Hydrogenation written by Gordon Stuart Jackson and published by . This book was released on 1988 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Donor induced Layer Disordering Via Silicon Diffusion in Aluminum Gallium Arsenide gallium Arsenide Quantum well Heterostructures and Disorder defined Index guided Stripe Geometry Laser Diodes written by Paul Gavrilovic and published by . This book was released on 1985 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Growth of Aluminum Gallium Arsenide gallium Arsenide Graded Barrier Quantum Well Heterostructure Lasers on Planar and Nonplanar Substrates by Metalorganic Chemical Vapor Deposition written by Michael Eugene Givens and published by . This book was released on 1992 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Room Temperature Continuous Operation of Aluminum Gallium Arsenide gallium Arsenide Quantum Well Heterostructure Lasers Grown on Silicon written by Derek Wusi Nam and published by . This book was released on 1987 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Characteristics of Aluminum Gallium Arsenide gallium Arsenide Conventional and Quantum well Double heterostructure Laser Diodes written by Eric Rune Anderson and published by . This book was released on 1981 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: