Active terahertz metamaterial devices
Abstract
Metamaterial structures are taught which provide for the modulation of terahertz frequency signals. Each element within an array of metamaterial (MM) elements comprises multiple loops and at least one gap. The MM elements may comprise resonators with conductive loops and insulated gaps, or the inverse in which insulated loops are present with conductive gaps; each providing useful transmissive control properties. The metamaterial elements are fabricated on a semiconducting substrate configured with a means of enhancing or depleting electrons from near the gaps of the MM elements. An on to off transmissivity ratio of about 0.5 is achieved with this approach. Embodiments are described in which the MM elements incorporated within a Quantum Cascade Laser (QCL) to provide surface emitting (SE) properties.
- Inventors:
-
- Los Alamos, NM
- Newton, MA
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1014949
- Patent Number(s):
- 7826504
- Application Number:
- US Patent Application 12/418,064
- Assignee:
- Los Alamos National Security, LLC (Los Alamos, NM)
- Patent Classifications (CPCs):
-
G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01Q - ANTENNAS, i.e. RADIO AERIALS
- DOE Contract Number:
- AC52-06NA25396
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Chen, Houtong, Padilla, Willie John, Averitt, Richard Douglas, O'Hara, John F, and Lee, Mark. Active terahertz metamaterial devices. United States: N. p., 2010.
Web.
Chen, Houtong, Padilla, Willie John, Averitt, Richard Douglas, O'Hara, John F, & Lee, Mark. Active terahertz metamaterial devices. United States.
Chen, Houtong, Padilla, Willie John, Averitt, Richard Douglas, O'Hara, John F, and Lee, Mark. Tue .
"Active terahertz metamaterial devices". United States. https://www.osti.gov/servlets/purl/1014949.
@article{osti_1014949,
title = {Active terahertz metamaterial devices},
author = {Chen, Houtong and Padilla, Willie John and Averitt, Richard Douglas and O'Hara, John F and Lee, Mark},
abstractNote = {Metamaterial structures are taught which provide for the modulation of terahertz frequency signals. Each element within an array of metamaterial (MM) elements comprises multiple loops and at least one gap. The MM elements may comprise resonators with conductive loops and insulated gaps, or the inverse in which insulated loops are present with conductive gaps; each providing useful transmissive control properties. The metamaterial elements are fabricated on a semiconducting substrate configured with a means of enhancing or depleting electrons from near the gaps of the MM elements. An on to off transmissivity ratio of about 0.5 is achieved with this approach. Embodiments are described in which the MM elements incorporated within a Quantum Cascade Laser (QCL) to provide surface emitting (SE) properties.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 02 00:00:00 EDT 2010},
month = {Tue Nov 02 00:00:00 EDT 2010}
}