Optically Implemented Broadband Blueshift Switch in the Terahertz Regime

TitleOptically Implemented Broadband Blueshift Switch in the Terahertz Regime
Publication TypeJournal Article
Year of Publication2011
AuthorsShen NH, Massaouti M, Gokkavas M, Manceau JM, Ozbay E, Kafesaki M, Koschny T, Tzortzakis S, Soukoulis CM
Journal TitlePhysical Review Letters
Date Published01
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000286742200021
Keywordscloak, frequencies, index, laser, metamaterials, phase modulator, RESONATORS

We experimentally demonstrate, for the first time, an optically implemented blueshift tunable metamaterial in the terahertz (THz) regime. The design implies two potential resonance states, and the photoconductive semiconductor (silicon) settled in the critical region plays the role of intermediary for switching the resonator from mode 1 to mode 2. The observed tuning range of the fabricated device is as high as 26% (from 0.76 THz to 0.96 THz) through optical control to silicon. The realization of broadband blueshift tunable metamaterial offers opportunities for achieving switchable metamaterials with simultaneous redshift and blueshift tunability and cascade tunable devices. Our experimental approach is compatible with semiconductor technologies and can be used for other applications in the THz regime.

URL<Go to ISI>://000286742200021
Alternate JournalPhys. Rev. Lett.