Broadband blueshift tunable metamaterials and dual-band switches
| Title | Broadband blueshift tunable metamaterials and dual-band switches |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Shen NH, Kafesaki M, Koschny T, Zhang L, Economou EN, Soukoulis CM |
| Journal Title | Physical Review B |
| Volume | 79 |
| Pages | 161102 |
| Date Published | 04/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000265945200002 |
| Keywords | capacitors, electro-optical modulation, electro-optical switches, frequencies, inductors, metamaterials, negative refractive-index, optical hyperlens, optical resonators, spectral line shift |
| Abstract | We propose a design and numerical study of an optically tunable metamaterial based on an electric-field-coupled inductor-capacitor resonator variant in the terahertz regime. In contrast to earlier proposed structures, we demonstrate that a blueshift of the resonance frequency under illumination can be accomplished with realistic material parameters and a broadband tuning range on the order of 40% has been demonstrated, which is found to be based on a photoconductivity-induced mode-switching effect. We also present a variant of this structure, which simultaneously possesses two resonance frequencies and can be used as an optically switchable dual-band resonator. Our all-optical modulators and switches may offer a step forward in filling the "THz gap.". |
| URL | <Go to ISI>://000265945200002 |
| DOI | 10.1103/Physrevb.79.161102 |
