# Browse College of Engineering by Contributor "Coleman, James J."

• (2011-05-25)
Anti-guided vertical-cavity surface-emitting laser (VCSEL) arrays have been designed, fabricated, and characterized using a number of methods. Two-dimensional coherent arrays are useful for biological and atmospheric ...

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• (2010-08-20)
A new class of photoassociation lasers has been demonstrated in which photoexcited alkali-rare gas collision pairs dissociate in order to produce inversion on atomic alkali transitions. The pump acceptance bandwidths of ...

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• (2014-01-16)
Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability ...

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• (1997)
The second challenge involved with the fabricating of integrated photonic devices is the formation of integrable high-Q cavities. The optical feedback in most laser diodes is provided by cleaved facets. Unfortunately, ...

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• (1992)
With the advent of sophisticated epitaxial growth techniques such as metalorganic chemical vapor deposition (MOCVD), compound semiconductor device research has flourished. Advancements in device physics as well as the ...

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• (2012-05-22)
In 2004, a research partnership between the University of Illinois and CU Aerospace demonstrated the first electric discharge pumped oxygen-iodine laser referred to as ElectricOIL. This exciting improvement over the ...

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PDF (12MB)
• (2003)
The future of self-assembled nanostructures lies in the selective placement of individual nanostructures for applications such as integrated optoelectronics, quantum computing and quantum encryption. By utilizing InGaAs ...

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• (1989)
The advance of crystal growth technology, specifically metalorganic chemical vapor deposition (MOCVD) as it relates to this work, has made it practical to manufacture an entirely new class of heterojunction devices. Physical ...

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• (2013-02-03)
A laser diode emits light at a specific wavelength band and can be used in specific applications depending on its wavelength. However, the bandwidth of the laser gain is relatively broad, so a distributed Bragg reflector ...

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• (1990)
This work describes novel fabrication processes and the advantages of metalorganic chemical vapor deposition (MOCVD) growth on nonplanar substrates which increase the maximum output power of semiconductor lasers when limited ...

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PDF (4MB)
• (1990)
Despite the vast use of metalorganic chemical vapor deposition (MOCVD) for the growth of optical and electronic devices, it is a process for which the details of the reaction mechanisms are not well understood. Efforts ...

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PDF (7MB)
• (1992)
Metalorganic chemical vapor deposition (MOCVD) is a crystal growth technique which has demonstrated the capacity to deposit epitaxial layers possessing the high levels of crystalline quality and material purity required ...

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• (2010-08-31)
A hybrid plasma-semiconductor phototransistor has been realized by substituting a plasma for the collector of an npn bipolar junction transistor. Designated as the plasma bipolar junction transistor (PBJT), this optoelectronic ...

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PDF (40MB)
• (2014-05-30)
In electronics, the integration of III-V compound semiconductor materials and silicon is a way to solve the silicon feature size limit and power consumption problems given the high electron mobility that the III-V ...

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PDF (988kB)
• (2013-08-22)
The quantum dot offers carrier confinement in three dimensions. It is expected to improve performance of photonic devices. However, quantum dot fabrication still requires significant quality improvement such as high ...

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• (1999)
Compliant membranes enable strain relief by depositing on an ultra-thin semiconductor base. Unlike growth on typical thick substrates, expansion of the compliant membrane during strained-layer regrowth allows the membrane ...

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• (1993)
Several characteristics of In$\sb{x}$Ga$\sb{1-x}$As-GaAs-Al$\sb{y}$Ga$\sb{1-y}$As separate confinement heterostructure strained-layer quantum well lasers are investigated in this work. The main implications of strain are ...

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• (1995)
Two types of integrable semiconductor lasers are investigated in this thesis. Semiconductor ring lasers with circular and square ring resonators are analyzed, and their fabrications and laser results are described. ...

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PDF (4MB)
• (2000)
The next technical challenge is to increase the number of lasing modes with as much control over the wavelength and linewidth as in today's single-wavelength semiconductor lasers. By utilizing multiple sections of periodic ...

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PDF (6MB)
• (2017-06-26)
Metal-assisted Chemical Etching (MacEtch) is a robust and versatile top-down etching process which has the capability of overcoming the limits of conventional wet and dry etching. The advantage of producing anisotropic ...

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