1 May 2015 Terahertz material characterization for nonreciprocal integrated optics
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Abstract
Interest in nonreciprocal terahertz (THz) integrated optics makes necessity to look for new materials active in this region and precisely characterize their optical properties. In this paper we present important aspects of the methods for determination of optical functions in far infrared (FIR) and THz spectral range. The techniques are applied to polyethylene cyclic olefin copolymer (Topas) and hexaferrites (BaFe12O19, SrFe12O19). Topas is promising material in integrated optics for THz radiation, thanks to its low absorption in this region. On the other hand, hexaferrites with its magneto-optic properties can be used for nonreciprocal integrated optic parts and radiation control. Samples were studied by THz time domain spectroscopy (THz-TDS) in spectral range 2 - 100 cm-1 by transmission and reflection. Advantage of presented THz time domain spectroscopy is measurement of the electric field wavefunction, which allows to obtain both the amplitude and phase spectra. In results we provide measured data, processing, and final computed optical properties of Topas and hexaferrites which reveal interesting optical behaviour in THz spectral range.
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Martin Mičica, Kamil Postava, Mathias Vanwolleghem, Tomáš Horák, Jean François Lampin, Jaromír Pištora, "Terahertz material characterization for nonreciprocal integrated optics", Proc. SPIE 9516, Integrated Optics: Physics and Simulations II, 951615 (1 May 2015); doi: 10.1117/12.2179449; https://doi.org/10.1117/12.2179449
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