Broadband terahertz generation of metamaterials
Patent
·
OSTI ID:1364589
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.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Assignee:
- Iowa State University Research Foundation, Inc.
- Patent Number(s):
- 9,684,221
- Application Number:
- 14/989,565
- OSTI ID:
- 1364589
- Country of Publication:
- United States
- Language:
- English
Broadband terahertz generation from metamaterials
|
journal | January 2014 |
Terahertz Response of a Microfabricated Rod–Split-Ring-Resonator Electromagnetic Metamaterial
|
journal | February 2005 |
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