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

Author

Bernier, Martin ; Garet, F. ; Coutaz, Jean-Louis

Author_Institution

IMEP-LAHC, Univ. of Savoie, Le Bourget du Lac, France

Volume

3

Issue

3

fYear

2013

fDate

41395

Firstpage

295

Lastpage

301

Abstract

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.

Keywords

absorption coefficients; organic compounds; reflection; refractive index; terahertz wave spectra; visible spectra; absorption coefficient; low-transmission bands; maltose; optical constants; pellets; precise determination; reflection measurement; reflection terahertz time-domain spectroscopy; refractive index; Absorption; Data mining; Frequency measurement; Materials; Mirrors; Phase measurement; Refractive index; Material characterization; THz time-domain spectroscopy (THz-TDS); reflection spectroscopy; transmission spectroscopy;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2013.2247793

Filename

6477199