THz Properties of Nematic Liquid Crystals

  • Nico Vieweg
  • Mohammad Khaled Shakfa
  • Benedikt Scherger
  • Martin Mikulics
  • Martin Koch


We systematically study the terahertz (THz) properties of a set of nematic liquid crystals. We use THz time domain spectroscopy to obtain data between 0.2 THz up to 2.5 THz. Such a broadband set of terahertz data has not yet been reported. From the measured data, we extract macroscopic data, such as the birefringence, the refractive indices and the absorption coefficients for ordinary and extraordinary polarization. The impact of different side chains and core structures on the terahertz anisotropy are discussed. This paper will serve as a data base and can be very useful for the design of new terahertz liquid crystal material.


Liquid crystals Terahertz Spectroscopy Birefringence 



The authors acknowledge the Merck KGaA for providing the samples. Nico Vieweg thanks the Studienstiftung des deutschen Volkes and the Braunschweig International School of Metrology (IGSM) for funding. Mohammad Khaled Shakfa acknowledges the Syrian Ministry of Higher Education for financial support. Benedikt Scherger would like to express his appreciation to the Friedrich Ebert Stiftung.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Nico Vieweg
    • 1
  • Mohammad Khaled Shakfa
    • 1
  • Benedikt Scherger
    • 1
  • Martin Mikulics
    • 2
  • Martin Koch
    • 1
  1. 1.Faculty of PhysicsPhilipps University MarburgMarburgGermany
  2. 2.Institute of Bio- and NanosystemsResearch Centre JülichJülichGermany

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