Patents by Inventor De Y. Zang

De Y. Zang 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).

  • Polarization-selective integrated optoelectronic devices incorporating crystalline organic thin films
    Patent number: 5172385
    Abstract: Certain crystalline organic semiconductor compounds, such as 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA), when deposited by an ultrahigh vacuum process of organic molecular beam deposition, form highly ordered "quasi-epitaxial" films (32). Due to asymmetries in the molecular crystal structure of such compounds, the ordering of the films results in giant asymmetries in their dielectric properties. Such large dielectric asymmetries permit the construction of a variety of devices, including optical isolators (38), optically isolated lasers (48), optical isolated optical amplifiers (64), polarization-selective photodiodes (76), and metal-organic-inorganic semiconductor-metal detectors, among others.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: December 15, 1992
    Assignee: University of Southern California
    Inventors: Stephen R. Forrest, Franky F. So, De Y. Zang