Resonant terahertz response of TiO2 microspheres

F. Dominec; C. Kadlec; H. Neměc; F. Kadlec; R. Yahiaoui; U.-C. Chung; C. Elissalde; M. Maglione; P. Mounaix; P. Kužel

doi:10.1117/12.2017006

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6 May 2013 Resonant terahertz response of TiO₂ microspheres

F. Dominec, C. Kadlec, H. Neměc, F. Kadlec, R. Yahiaoui, U.-C. Chung, C. Elissalde, M. Maglione, P. Mounaix, P. Kužel

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Proceedings Volume 8771, Metamaterials VIII; 87710L (2013) https://doi.org/10.1117/12.2017006
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

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.

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F. Dominec, C. Kadlec, H. Neměc, F. Kadlec, R. Yahiaoui, U.-C. Chung, C. Elissalde, M. Maglione, P. Mounaix, and P. Kužel "Resonant terahertz response of TiO₂ microspheres", Proc. SPIE 8771, Metamaterials VIII, 87710L (6 May 2013); https://doi.org/10.1117/12.2017006

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