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Dynamic response of metamaterials in the terahertz regime: Blueshift tunability and broadband phase modulation

TitleDynamic response of metamaterials in the terahertz regime: Blueshift tunability and broadband phase modulation
Publication TypeJournal Article
Year of Publication2010
AuthorsManceau JM, Shen NH, Kafesaki M, Soukoulis CM, Tzortzakis S
Journal TitleApplied Physics Letters
Volume96
Pages021111
Date Published01/11
ISBN Number0003-6951
Accession NumberISI:000273689400011
Keywordsgaas, gallium arsenide, high-speed optical techniques, iii-v semiconductors, metamaterials, negative refractive-index, numerical analysis, spectroscopy, terahertz wave spectra, THz
Abstract

Terahertz time-domain spectroscopy is used to probe the electromagnetic properties of metamaterials, which are dynamically photoexcited, using synchronized femtosecond near-infrared laser pulses. Blueshift tunability of the electric dipole metamaterial's resonance, as well as a broadband phase tunability reaching similar to pi/4, are demonstrated. Numerical simulations show the observations are due to changes in the complex index of the photoexcited semiconductor substrate.
URL<Go to ISI>://000273689400011
DOI10.1063/1.3292208