Broadband terahertz generation of metamaterials
Abstract
Provided are systems and methods to generate single-cycle THz pulses from a few tens of nanometers thin layer of split ring resonators (SRRs) via optical rectification of femtosecond laser pulses. The emitted THz radiation, with a spectrum ranging from about 0.1 to 4 THz, arises exclusively from pumping the magnetic-dipole resonance of SRRs around 200 THz. This resonant enhancement, together with pump polarization dependence and power scaling of the THz emission, underpins the nonlinearity from optically induced circulating currents in SRRs, with a huge effective nonlinear susceptibility of 0.8.times.10.sup.-16 m.sup.2/V that far exceeds surface nonlinearities of both thin films and bulk organic/inorganic crystals and sheet nonlinearities of non-centrosymmetric materials such as ZnTe.
- Inventors:
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1364589
- Patent Number(s):
- 9684221
- Application Number:
- 14/989,565
- Assignee:
- Iowa State University Research Foundation, Inc.
- 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
- DOE Contract Number:
- ACO2-07CH11358
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2016 Jan 06
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Luo, Liang, Wang, Jigang, Koschny, Thomas, Wegener, Martin, and Soukoulis, Costas M. Broadband terahertz generation of metamaterials. United States: N. p., 2017.
Web.
Luo, Liang, Wang, Jigang, Koschny, Thomas, Wegener, Martin, & Soukoulis, Costas M. Broadband terahertz generation of metamaterials. United States.
Luo, Liang, Wang, Jigang, Koschny, Thomas, Wegener, Martin, and Soukoulis, Costas M. Tue .
"Broadband terahertz generation of metamaterials". United States. https://www.osti.gov/servlets/purl/1364589.
@article{osti_1364589,
title = {Broadband terahertz generation of metamaterials},
author = {Luo, Liang and Wang, Jigang and Koschny, Thomas and Wegener, Martin and Soukoulis, Costas M.},
abstractNote = {Provided are systems and methods to generate single-cycle THz pulses from a few tens of nanometers thin layer of split ring resonators (SRRs) via optical rectification of femtosecond laser pulses. The emitted THz radiation, with a spectrum ranging from about 0.1 to 4 THz, arises exclusively from pumping the magnetic-dipole resonance of SRRs around 200 THz. This resonant enhancement, together with pump polarization dependence and power scaling of the THz emission, underpins the nonlinearity from optically induced circulating currents in SRRs, with a huge effective nonlinear susceptibility of 0.8.times.10.sup.-16 m.sup.2/V that far exceeds surface nonlinearities of both thin films and bulk organic/inorganic crystals and sheet nonlinearities of non-centrosymmetric materials such as ZnTe.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {6}
}
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