Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524

Article

Condensed Matter

Published online January 15, 2006    

Copyright © The Korean Physical Society.

Impedance Matching Plasmonic Metamaterials to Vacuum

J. W. Lee, M. A. Seo, J. Y. Sohn, D. J. Park, Y. H. Ahn, D. S. Kim, S. C. Jeoung and Q-Han Park

J. Korean Phys. Soc. 48(1), 103 (2006)

Abstract

We report on a 100 \% transmission in one- and two-dimensional plasmonic metamaterials in the terahertz frequency range. At a specific frequency at which the plasmonic meta material is perfectly impedance matched to vacuum, the metal material becomes essentially invisible. In the case of a two-dimensional array of square holes, perfect impedance matching occurs when the effective dielectric constant becomes --2 for samples with hole coverages larger than 0.19. In a one-dimensional array of slits, transmission becomes 100 \% when a symmetric eigenmode is excited and therefore the system becomes effectively impedance-matched.