Journal
PHYSICAL REVIEW B
Volume 79, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.161102
Keywords
capacitors; electro-optical modulation; electro-optical switches; inductors; metamaterials; optical resonators; spectral line shift
Funding
- EU [213390]
- ENSEMBLE
- ECONAM
- COST Actions [MP0702, MP0803]
- Air Force Office of Scientific Research
- Air Force Material Command
- USAF [FA8655-07-1-3037]
- Department of Energy (Basic Energy Science) [DE-ACD2-07CH11358]
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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..
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