Quantitative investigation of a terahertz artificial magnetic resonance using oblique angle spectroscopy

TitleQuantitative investigation of a terahertz artificial magnetic resonance using oblique angle spectroscopy
Publication TypeJournal Article
Year of Publication2007
AuthorsT.. Driscoll, G..O. Andreev, D.N. Basov, S.. Palit, T.. Ren, J.J. Mock, S..Y. Cho, N.M. Jokerst, D.R. Smith
JournalApplied Physics Letters
Volume90
Issue9
ISBN Number0003-6951
Accession NumberWOS:000244591700066
Abstract

The authors present a spectroscopic analysis of a planar split-ring-resonator (SRR) medium at terahertz frequencies, quantitatively characterizing the associated magnetic resonance. Experimental quantification at terahertz and infrared frequencies of metamaterial optical constants has been primarily absent, largely due to the difficulty of collecting phase information at these frequencies. In this letter, the authors circumvent the need for phase information in the characterization by acquiring the power transmitted through the metamaterial at a series of oblique angles, and relating the multiangle data set to the effective permittivity and permeability through the Fresnel expressions. The resulting measurements reveal the expected resonant permeability of the SRR which exhibits a range of negative values, the minimum value being mu=-0.8 at 1.1 THz. (c) 2007 American Institute of Physics.