Abstract: Devices including graphene quantum dots yield extremely high performance THz bolometers, by measuring the current of hot electrons formed in the graphene source and drain electrodes of the device and propagating through the graphene quantum dot connected thereto. Devices may also include additional materials such as MoS2, as well as one or more gate electrodes to alter performance as needed.
Type:
Application
Filed:
December 6, 2016
Publication date:
October 1, 2020
Applicants:
Georgetown University, U.S. Naval Research Laboratory
Inventors:
Abdel El Fatimy, Paola Barbara, Kurt Gaskill
Abstract: Systems and methods for remotely detecting nuclear and non-nuclear materials such as chemical agents and gas-phase explosives are disclosed. Nuclear and non-nuclear materials may be detected by transmitting electromagnetic energy toward a remote target area, collecting scattered electromagnetic energy reflected from the remote target area, analyzing an absorption spectrum of the collected scattered electromagnetic energy, and detecting a presence of at least one nuclear or non-nuclear material in the remote target area based on the analyzed absorption spectrum.
Type:
Application
Filed:
June 1, 2012
Publication date:
December 6, 2012
Applicants:
U.S. Naval Research Laboratory, Temple University of the Commonwealth System of Higher Education
Inventors:
DONG HO WU, RONGJIA TAO, BENJAMIN D. GRABER
Abstract: Methods and systems for detecting nuclear material concealed within an enclosure are provided. An ionized air density is measured at one or more locations outside of the enclosure. The presence of the concealed nuclear material is detected, for each of the one or more locations, based on a characteristic of the measured ionized air density indicative of concealed nuclear materials.
Type:
Application
Filed:
February 5, 2010
Publication date:
February 2, 2012
Applicants:
U.S. Naval Research Laboratory, Temple University of the Commonwealth System of Higher Education