Hybrid metamaterials enable fast electrical modulation of freely propagating terahertz waves

TitleHybrid metamaterials enable fast electrical modulation of freely propagating terahertz waves
Publication TypeJournal Article
Year of Publication2008
AuthorsH..T. Chen, S.. Palit, T.. Tyler, C..M. Bingham, J..M.O. Zide, J.F. O'Hara, D.R. Smith, A..C. Gossard, R..D. Averitt, W..J. Padilla, N.M. Jokerst, A..J. Taylor
JournalApplied Physics Letters
Volume93
Issue9
ISBN Number0003-6951
Accession NumberWOS:000258975800017
Abstract

We demonstrate fast electrical modulation of freely propagating terahertz waves at room temperature using hybrid metamaterial devices. The devices are planar metamaterials fabricated on doped semiconductor epitaxial layers, which form hybrid metamaterial-Schottky diode structures. With an applied ac voltage bias, we show modulation of terahertz radiation at inferred frequencies over 2 MHz. The modulation speed is limited by the device depletion capacitance which may be reduced for even faster operation. (c) 2008 American Institute of Physics.