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Proceedings Paper

Optically tunable photonic crystals used as devices for the THz range
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Paper Abstract

In this work we report on structures operating as actively tunable filters or modulators for the terahertz spectral range. These devices can be described as one-dimensional photonic crystals with defects and are composed of quartz, MgO and GaAs thin platelets; the optically transparent materials (quartz and MgO) are used as Bragg mirrors forming a resonator and GaAs is placed inside this resonator. The tunability is achieved by photoexcitation of free carriers within the GaAs layer by an ultrashort laser pulse. The optical control of such devices features a very fast (sub-nanosecond) response which is attractive e.g. for future applications in telecommunications.

Paper Details

Date Published: 4 May 2007
PDF: 8 pages
Proc. SPIE 6581, Metamaterials II, 65810O (4 May 2007); doi: 10.1117/12.723348
Show Author Affiliations
Filip Kadlec, Institute of Physics (Czech Republic)
Petr Kužel, Institute of Physics (Czech Republic)

Published in SPIE Proceedings Vol. 6581:
Metamaterials II
Vladimir Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

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