Patents by Inventor David N. Woolf

David N. Woolf 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).

  • Publication number: 20170085212
    Abstract: The present invention enables elective emission from a heterogeneous metasurface that can survive repeated temperature cycling at high temperatures (e.g., greater than 1300 K). Simulations, fabrication and characterization were performed for an exemplary cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6 eV InGaAs TPV material. Spectral measurements of the metasurface resulted in a predicted 32% optical-to-electrical power conversion efficiency. The broadly adaptable selective emitter design can be easily scaled for integration with TPV systems.
    Type: Application
    Filed: May 7, 2015
    Publication date: March 23, 2017
    Inventors: Eric A. Shaner, Jeffrey C. Cederberg, David N. Woolf, Joel M. Hensley