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Title: 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:
 [1];  [2];  [2];  [1];  [3]
  1. Los Alamos, NM
  2. Newton, MA
  3. Albuquerque, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (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):
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03C - MODULATION
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
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 = {2010},
month = {11}
}

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