Terahertz metamaterials
| DWPI Title: Microfabricated terahertz metamaterial for e.g. polarization multiplexer, has periodic array of resonator elements comprising lattice constant that is smaller than wavelength of incident electromagnetic radiation |
| Abstract: Terahertz metamaterials comprise a periodic array of resonator elements disposed on a dielectric substrate or thin membrane, wherein the resonator elements have a structure that provides a tunable magnetic permeability or a tunable electric permittivity for incident electromagnetic radiation at a frequency greater than about 100 GHz and the periodic array has a lattice constant that is smaller than the wavelength of the incident electromagnetic radiation. Microfabricated metamaterials exhibit lower losses and can be assembled into three-dimensional structures that enable full coupling of incident electromagnetic terahertz radiation in two or three orthogonal directions. Furthermore, polarization sensitive and insensitive metamaterials at terahertz frequencies can enable new devices and applications. |
| Use: Microfabricated terahertz metamaterial e.g. polarization insensitive metamaterial utilized for filtering, imaging, and communications application and polarization sensitive metamaterial utilized for a polarimetric device such as polarization multiplexer, waveplate and polarizing beamsplitter. |
| Advantage: The metamaterials are fabricated on a large-area free-standing thin dielectric membrane to reduce dielectric losses and enable flexible and conformable designs. The metamaterial releases a metamaterial-covered membrane from the substrate, thus enabling fabrication of arbitrarily curved 3D metamaterials, where flexibility of the membrane is wrapped around a curved substrate without breaking. |
| Novelty: The metamaterial has a free-standing thin dielectric membrane (29) whose thickness is less than one micron. A periodic array of resonator elements (28) is arranged on the dielectric membrane. The resonator elements comprise a structure that provides a tunable magnetic permeability or a tunable electric permittivity for an incident electromagnetic radiation at a frequency of greater than 100 GHz. The periodic array comprises a lattice constant that is smaller than the wavelength of the incident electromagnetic radiation. |
| Filed: 10/31/2008 |
| Application Number: US2008262422A |
| Tech ID: SD 10944.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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