Resonant terahertz response of TiO.sub.2./sub. microspheres

0399088 - FZÚ 2014 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Dominec, Filip - Kadlec, Christelle - Němec, Hynek - Kadlec, Filip - Yahiaoui, R. - Chung, U.-C. - Elissalde, C. - Maglione, M. - Mounaix, P. - Kužel, Petr
Resonant terahertz response of TiO₂ microspheres.
METAMATERIALS VIII. Vol. 8771. BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING, 2013 - (Kuzmiak, V.; Markos, P.; Szoplik, T.), s. 1-6. ISBN 978-0-8194-9573-0. ISSN 0277-786X.
[Conference on Metamaterials VIII. Prague (CZ), 17.04.2013-18.04.2013]
Grant ostatní: GA AV ČR(CZ) M100101218
Institucionální podpora: RVO:68378271
Klíčová slova: metamaterials * time-domain terahertz spectroscopy
Kód oboru RIV: BH - Optika, masery a lasery

We present an experimental approach allowing the evaluation of the effective dielectric permittivity and magnetic permeability of metamaterials from measurements by time-domain terahertz spectroscopy. A resonant magnetic response of TiO2 dielectric microspheres was observed in the THz range, showing that negative effective permeability can be achieved in this way. Numerical simulations explain the observed behavior, and show that by combining the microspheres with a metallic mesh, a negative refractive index can be obtained.
Trvalý link: http://hdl.handle.net/11104/0226463