Polarization-independent active metamaterial for high-frequency terahertz modulation

Oliver Paul*, Christian Imhof, Bert Laegel, Sandra Wolff, Jan Heinrich, Sven Höfling, Alfred Forchel, Remigius Zengerle, Rene Beigang, Marco Rahm

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)

Abstract

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. (C) 2008 Optical Society of America

Original languageEnglish
Pages (from-to)819-827
Number of pages9
JournalOptics Express
Volume17
Issue number2
Publication statusPublished - 19 Jan 2009

Keywords

  • NEGATIVE-INDEX
  • REFRACTION

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