Abstract: Optical devices that include one or more structures fabricated from polar-dielectric materials that exhibit surface phonon polaritons (SPhPs), where the SPhPs alter the optical properties of the structure. The optical properties lent to these structures by the SPhPs are altered by introducing charge carriers directly into the structures. The carriers can be introduced into these structures, and the carrier concentration thereby controlled, through optical pumping or the application of an appropriate electrical bias.
Type:
Application
Filed:
March 15, 2018
Publication date:
July 19, 2018
Applicant:
The Goverment of the United States of America, as represented by the Secretary of the Navy
Inventors:
James Peter Long, Joshua D. Caldwell, Jeffrey C. Owrutsky, Orest J. Glembocki
Abstract: A three step method for the conversion of ethanol into fuels that can be utilized as full-performance military jet or diesel fuels. Embodiments of the invention further describe methods for the selective conversion of ethanol to full performance saturated hydrocarbon fuels that are suitable for both jet and diesel propulsion.
Type:
Grant
Filed:
June 28, 2016
Date of Patent:
December 12, 2017
Assignee:
The Goverment of United States of America as Represented by to Secretary of the Navy
Abstract: A method for independently tuning bandwidth and center frequencies in a bandpass filter. The filter can be configured with a plurality of resonators, wherein the resonators are coupled over a certain coupling region. Additionally, the filter can be configured with a plurality of tuning elements. For each of the inter-resonator couplings, at least one of the resonators associated with the inter-resonator coupling can have a first tuning element placed at a first location on the resonator and a second tuning element placed at a second location on the resonator. Simultaneously tuning the first and second tuning elements can adjust the center frequency, and offset tuning the first and second tuning elements can adjust the bandwidth frequency.
Type:
Grant
Filed:
September 28, 2011
Date of Patent:
December 29, 2015
Assignee:
The Goverment of the United States of America, as represented by the Secretary of the Navy
Abstract: An electron injector including an electron source and a conducting grid situated close to the electron source, one or more RF accelerating/bunching cavities operating at the same fundamental RF frequency; a DC voltage source configured to bias the cathode at a small positive voltage with respect to the grid; a first RF drive configured to apply an RF signal between the cathode and grid at the fundamental and third harmonic RF frequencies; and a second RF drive configured to apply an RF drive signal to the accelerating/bunching cavities. Electrons are emitted by the cathode and travel through the grid to the accelerating/bunching cavities for input into an RF linac.
Type:
Application
Filed:
May 17, 2011
Publication date:
December 15, 2011
Applicant:
The Goverment of the United States of America, as represented by the Secretary of the Navy
Inventors:
Phillip A. Sprangle, Steven H. Gold, Antonio C. Ting, Joseph R. Penano, Daniel F. Gordon, Bahman Hafizi
Abstract: A device having a substrate, a pair of ferromagnetic leads on a surface of the substrate, laterally separated by a gap, and one or more ferromagnetic microparticles comprising a conductive coating at least partially within the gap. The conductive coating forms at least part of an electrical connection between the leads. A molecular junction may connect the leads to the microparticle.
Type:
Application
Filed:
December 12, 2007
Publication date:
April 17, 2008
Applicant:
The Goverment of the United States of America, as represented by the Secretary of the Navy