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Full-Text Articles in Physics
Evidence Of Longitudinal Acoustic Phonon Generation In Si Doping Superlattices By Ge Prism-Coupled Thz Laser Radiation, Thomas E. Wilson, Konstantin Korolev, Erich Kasper, Michael Oehme, Jörg Schulze
Evidence Of Longitudinal Acoustic Phonon Generation In Si Doping Superlattices By Ge Prism-Coupled Thz Laser Radiation, Thomas E. Wilson, Konstantin Korolev, Erich Kasper, Michael Oehme, Jörg Schulze
Thomas E. Wilson
We report on the direct excitation of 246 GHz longitudinal acoustic phonons in silicon doping superlattices by the resonant absorption of nanosecond-pulsed far-infrared laser radiation of the same frequency. A longitudinally polarized evanescent laser light field is coupled to the superlattice through a germanium prism providing total internal reflection at the superlattice interface. The ballistic phonon signal is detected by a superconducting aluminum bolometer. The sample is immersed in low-temperature liquid helium.
Bilayer Lift-Off Process For Aluminum Metallization, Thomas E. Wilson, Konstantin Korolev, Nathaniel A. Crow
Bilayer Lift-Off Process For Aluminum Metallization, Thomas E. Wilson, Konstantin Korolev, Nathaniel A. Crow
Thomas E. Wilson
Recently published reports in the literature for bilayer lift-off processes have described recipes for the patterning of metals that have recommended metal-ion-free developers, which do etch aluminum. We report the first measurement of the dissolution rate of a commercial lift-off resist (LOR) in a sodium-based buffered commercial developer that does not etch aluminum. We describe a reliable lift-off recipe that is safe for multiple process steps in patterning thin (<100 nm) and thick aluminum devices with micron-feature sizes. Our patterning recipe consists of an acid cleaning of the substrate, the bilayer (positive photoresist/LOR) deposition and development, the sputtering of …
International Conference On Phonon Scattering In Condensed Matter (Phonons 2015), Thomas Wilson
International Conference On Phonon Scattering In Condensed Matter (Phonons 2015), Thomas Wilson
Thomas E. Wilson
Dr. Thomas E. Wilson, professor of physics, had an abstract accepted for an oral presentation at the 15th International Conference on Phonon Scattering in Condensed Matter (Phonons 2015), held at the University of Nottingham, United Kingdom July 12-17.