Polarization-independent active metamaterial for high-frequency terahertz modulation
We present a polarization-independent metamaterial design for the construction of electrically tunable terahertz (THz) devices. The implemented structure consists of an array of gold crosses fabricated on top of an n-doped gallium arsenide (GaAs) layer. Utilizing THz time-domain spectroscopy, we sho...
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| Veröffentlicht in: | Optics express 2009-01, Vol.17 (2), p.819-827 |
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| container_title | Optics express |
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| creator | Paul, Oliver Imhof, Christian Lägel, Bert Wolff, Sandra Heinrich, Jan Höfling, Sven Forchel, Alfred Zengerle, Remigius Beigang, René Rahm, Marco |
| description | We present a polarization-independent metamaterial design for the construction of electrically tunable terahertz (THz) devices. The implemented structure consists of an array of gold crosses fabricated on top of an n-doped gallium arsenide (GaAs) layer. Utilizing THz time-domain spectroscopy, we show that the electric resonance and thus the transmission properties of the cross structure can be tuned by an externally applied bias voltage. We further demonstrate the fast amplitude modulation of a propagating THz wave for modulation frequencies up to 100 kHz. |
| doi_str_mv | 10.1364/oe.17.000819 |
| format | Article |
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| source | Directory of Open Access Journals(OpenAccess); EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| title | Polarization-independent active metamaterial for high-frequency terahertz modulation |
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