Negative Index of Refraction Observed in a Single Layer of ClosedRing Magnetic Dipole Resonators

Journal Article · Tue Nov 27 00:00:00 EST 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2825468· OSTI ID:927254

Hao, Zhao; Martin, Michael C; Harteneck, Bruce; Cabrini, Stefano; Anderson, Erik H

We report the results of a spectroscopic study of a singlelayer of metallic single closed ring resonators on free-standing thinmembrane at near-normal and grazing angles of incidence. When themagnetic component of the light is perpendicular to the ring plane, weobserve a negative index of refraction down to -1 around 150 terahertz(THz), attributed to a strong magnetic dipolar resonance and a broadelectric resonance in this metamaterial. We experimentally identify thedifferent resonance modes and the spectral region of negative refractiveindex on a series of samples with different feature and lattice sizes,comparing to electromagnetic simulations.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Advanced Light Source(ALS)
• Sponsoring Organization: USDOE Director. This work was supported by the LaboratoryDirected Research andDevelopment Program and at Molecular Foundry by theOffice of Science. Office of Basic Energy Sciences, of Lawrence BerkeleyNational Laboratory under the Department of Energy Contract No.DE-AC02-05CH11231.
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 927254
• Report Number(s): LBNL-63710; APPLAB; R&D Project: AJ06MA; TRN: US200811%%76
• Journal Information: Applied Physics Letters, Vol. 91, Issue 25; Related Information: Journal Publication Date: 20 December2007; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36
ELECTRIC RESONANCE
MAGNETIC DIPOLES
MEMBRANES
REFRACTIVE INDEX
RESONANCE
RESONATORS
metamaterial negative refractive index terahertz infraredoptics nanofabrication FTIR