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Terahertz time-domain spectroscopy of nematic liquid crystalsFormat | Member Price | Non-Member Price |
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Paper Abstract
Liquid crystals are candidate materials for optical devices operating in the Terahertz (THz) frequency region of the
electromagnetic spectrum. Proposed devices include THz phase shifters and THz quarter wave plates. To assist in
designing for these applications, the fundamental properties of the materials should be determined. Fundamental optical
properties to be determined over the frequency range of interest are the refractive index n and the absorption coefficient
α. According to the orientation of the liquid crystals relative to the polarisation of the light field, ordinary and
extraordinary values for the refractive index may be distinguished. In early work, employing time-domain spectroscopy,
a rise in both no and ne with optical frequency in the THz region was reported. Later work, employing two-colour
generation of THz radiation, indicated the values of no and ne were both relatively constant in the THz region. We have
now made measurements of the two common nematic liquid crystals K15 and E7 using time-domain THz spectroscopy
and confirm that no and ne show little change over the spectral region 0.15 to 1 THz.
Paper Details
Date Published: 5 June 2010
PDF: 12 pages
Proc. SPIE 7728, Nonlinear Optics and Applications IV, 77281Y (5 June 2010); doi: 10.1117/12.854810
Published in SPIE Proceedings Vol. 7728:
Nonlinear Optics and Applications IV
Benjamin J. Eggleton; Alexander Luis Gaeta; Neil G. R. Broderick, Editor(s)
PDF: 12 pages
Proc. SPIE 7728, Nonlinear Optics and Applications IV, 77281Y (5 June 2010); doi: 10.1117/12.854810
Show Author Affiliations
M. Koeberle, Technische Univ. Darmstadt (Germany)
R. Jakoby, Technische Univ. Darmstadt (Germany)
R. Jakoby, Technische Univ. Darmstadt (Germany)
Published in SPIE Proceedings Vol. 7728:
Nonlinear Optics and Applications IV
Benjamin J. Eggleton; Alexander Luis Gaeta; Neil G. R. Broderick, Editor(s)
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