Open AccessPlanar terahertz waveguides based on complementary split ring resonators
Author(s) -
Gagan Kumar,
Albert Cui,
Shashank Pandey,
Ajay Nahata
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.001072
Subject(s) - metamaterial , split ring resonator , terahertz radiation , planar , resonator , optics , materials science , excitation , waveguide , plasmon , transmission coefficient , refractive index , negative refraction , optoelectronics , terahertz spectroscopy and technology , transmission (telecommunications) , physics , telecommunications , computer graphics (images) , quantum mechanics , computer science
We experimentally demonstrate planar plasmonic THz waveguides using metal films that are periodically perforated with complementary split ring resonators (CSRRs). The waveguide transmission spectra exhibit numerous transmission resonances. While the geometry is commonly used in developing negative index materials, the excitation geometry used here does not allow for conventional metamaterial response. Instead, we show that all of the observed resonances can be determined from the geometrical properties of the CSRR apertures. Surprisingly, the Bragg condition does not appear to limit the frequency extent of the observed resonances. The results suggest that metamaterial-inspired geometries may be useful for developing THz guided-wave devices.