Michael A Stroscio
University of Illinois at Chicago, USA
Michael A. Stroscio (FIEEE, FAPS, FAAAS), is a UIC Distinguished Professor and Richard and Loan Hill Professor. He has authored about 800 papers, books, book chapters, proceedings, patents and presentations, with about 350 of these contributions being refereed papers. He holds a PhD form Yale University.
A novel heterostructure photodetector design is presented that facilitates dramatic enhancements of signal-to-noise. The structure incorporates a single quantum well coupled to a symmetric double quantum well that makes it possible to engineer energy states with energy state separations equal to an interface phonon energy. In addition, quantum level energy degeneracy between states in the single-well and double-well systems makes it possible to enhance the rate of interface-phonon-assisted transitions. The techniques underlying this approach have been discussed previously by Stroscio and Dutta in Phonons in Nanostructures (Cambridge University Press, 2001). Together, these effects make it possible to greatly enhance signal-to-noise ratios in these heterostructure-based photodetectors. These designs are optimized based on Schrödinger equation calculations of the energy states and the determination of interface phonon potentials and dispersion modes by applying boundary conditions for which the phonon potential has corresponding continuous normal components of the displacement field and tangential components of electric fields. Novel photodetector designs with dramatically enhanced signal-to-noise will be presented for a number of different heterostructure devices.
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