Patents by Inventor Michael Clement Wanke

Michael Clement Wanke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Flat minibands with spatially symmetric wavefunctions in intersubband superlattice light emitters
    Patent number: 6556604
    Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that is divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: April 29, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Federico Capasso, Alfred Yi Cho, Sung-Nee George Chu, Claire F. Gmachl, Albert Lee Hutchinson, Arthur Mike Sergent, Deborah Lee Sivco, Alessandro Tredicucci, Michael Clement Wanke