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US 2012/0057616 A1Published application
Dynamical/Tunable Electromagnetic Materials and Devices
AssigneeLos Alamos National Security, LLC
InventorsWillie J. Padilla, Richard Averitt
Life of this patent
Estimating the term…
Abstract
A composite material that is responsive to either electromagnetic or thermal radiation. The composite has a controllable structure that is either dynamically or tunably responsive to such radiation and comprises a metamaterial. Sensors, such as a bolometer, that incorporate the composite are also described.
Claims10
An article of manufacture comprising:
- a dielectric substrate, and
- a planar array of split ring resonators on the substrate, each split ring resonator comprising double ring structure, each ring of the double ring structure comprised of a material selected from a transition metal and alloy thereof, each ring comprising an active region, the active region being a gap in the ring filled with a material selected from a semiconductor and a ferroelectric material.
A terahertz switch structure comprising:
- a dielectric substrate of gallium arsenide, and
- a planar array of copper split ring resonators on the substrate, each split ring resonator having a thickness of 3 micrometers and an outer dimension of 36 micrometers and comprising a double ring structure, each ring of the double ring structure comprising a gap of approximately 2 micrometers, wherein said terahertz switch structure behaves as a terahertz switch when said gap is shorted out by a suitable photoexcitation of free carriers in the substrate which turns off an electric resonance of the terahertz switch structure.
Dependencies are inferred from the claim text.