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Type: 
Journal
Description: 
In this paper, we present our results for the anisotropic refractive index measurements of commonly used liquid crystal (LC) materials (E7 and 5CB) in the whole visible–near infrared range. In order to achieve a high accuracy in the obtained values, we have employed a combination of two techniques, namely, Mueller matrix spectroscopic ellipsometry in transmission and half-leaky-guided-mode (HLGM). Measurements with the HLGM technique are usually performed at a single wavelength. In order to obtain a spectroscopic measurement based on the HLGM technique in a wide wavelength range, we modified our commercial VASE® ellipsometer. In particular, we designed a sample holder by means of which measurements in guiding structures are also possible. Thus, we take advantage of the wide-spectrum light, emitted from a standard Xe lamp of the ellipsometer, also in the HLGM setup. The complementary …
Publisher: 
AIP
Publication date: 
1 Apr 2007
Authors: 

G Abbate, V Tkachenko, A Marino, F Vita, M Giocondo, A Mazzulla, L De Stefano

Biblio References: 
Volume: 101 Issue: 7 Pages: 073105
Origin: 
Journal of applied physics