Precise Determination of the Refractive Index of Samples Showing Low Transmission Bands by THz Time-Domain Spectroscopy

Precise Determination of the Refractive Index of Samples Showing Low Transmission Bands by THz Time-Domain Spectroscopy

In this paper, we propose a method to determine the refractive index and the absorption coefficient of samples showing spectral bands of very low transmission. The method, takes advantages of both transmission and reflection terahertz time-domain spectroscopy (THz-TDS) to obtain more precise optical...

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Veröffentlicht in:IEEE transactions on terahertz science and technology 2013-05, Vol.3 (3), p.295-301
Hauptverfasser: Bernier, M., Garet, F., Coutaz, J.
Format: Artikel
Sprache:eng
Schlagworte:
Absorption
Data mining
Engineering Sciences
Frequency measurement
Material characterization
Materials
Mirrors
Optics
Phase measurement
Photonic
reflection spectroscopy
Refractive index
THz time-domain spectroscopy (THz-TDS)
transmission spectroscopy
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Beschreibung
Zusammenfassung:In this paper, we propose a method to determine the refractive index and the absorption coefficient of samples showing spectral bands of very low transmission. The method, takes advantages of both transmission and reflection terahertz time-domain spectroscopy (THz-TDS) to obtain more precise optical constants than when only reflection measurement is used. It has been then validated using pellets made of maltose, which exhibits resonant lines within the THz spectral range.
ISSN:2156-342X
2156-3446
DOI:10.1109/TTHZ.2013.2247793