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Title: Broadband terahertz generation of metamaterials

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:
OSTI Identifier:
1364589
Assignee:
Iowa State University Research Foundation, Inc. AMES
Patent Number(s):
9,684,221
Application Number:
14/989,565
Contract Number:
ACO2-07CH11358
Resource Relation:
Patent File Date: 2016 Jan 06
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Other works cited in this record:

Dynamically variable metamaterial lens and method
patent, January 2011

Meta materials integration, detection and spectral analysis
patent, September 2012

Broadband terahertz generation from metamaterials
journal, January 2014
  • Luo, Liang; Chatzakis, Ioannis; Wang, Jigang
  • Nature Communications, Vol. 5, Article No. 3055
  • DOI: 10.1038/ncomms4055

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