Search Results - john+tolle

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Low Temperature Epitaxial Growth of Quaternary Wide Bandgap Semiconductors
The advent of epitaxial techniques for growing thin films has allowed for the growth of unnatural, metastable structures having properties previously unattainable in equilibrium systems. Specifically, quaternary compounds are of great interest for microelectronic and optoelectronic devices due to expectations that these materials will exhibit...
Published: 2/23/2023   |   Inventor(s): John Kouvetakis, Ignatius Tsong, Radek Roucka, John Tolle
Keywords(s): Materials
Category(s): Physical Science, Semiconductors, Materials & Processes
Materials and Optical Devices Based on Group IV Quantum Wells Grown on Si-Ge-Sn Buffered Silicon
The ability to manufacture high quality Sn-Ge and Si-Ge-Sn alloys has significant industry value for various reasons; however, existing techniques have failed to produce sufficiently high quality alloys to allow for effective use of these alloys in device applications. Specifically, the ability of Sn-Ge alloys to transition from indirect- to direct-gap...
Published: 2/23/2023   |   Inventor(s): John Kouvetakis, Jose Menendez, John Tolle
Keywords(s): Optoelectronics
Category(s): Physical Science, Semiconductor Devices