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Second-Harmonic Generation in a Bent-Core Nematic Liquid Crystal
Physical Review E
  • Seung Ho Hong
  • J. C. Williams
  • Robert J. Twieg
  • Antal Jakli, Kent State University - Kent Campus
  • Jim T. Gleeson
  • Samuel N. Sprunt
  • Brett Ellman
Publication Date
Document Type
  • harmonic-generation,
  • centrosymmetric material,
  • Rayleigh-scattering,
  • phase,
  • molecules,
  • tensor,
  • sphere,
  • media
Second-Second-harmonic generation (SHG) is studied in the magnetically aligned nematic phase of a bent-core liquid crystal (BCN) and compared to similar measurements made on a conventional rodlike (calamitic) nematic compound. The second-harmonic (SH) light detected from both materials is predominantly due to scattering and therefore incoherent. Results on the calamitic are consistent with a polarization induced by ordinary director fluctuations in the nematic phase. However, the SH scattering collected in the BCN exhibits a different temperature and angular dependence. We discuss how these differences could arise from the effects of short-range correlated, smectic-C-type molecular clusters, which have been detected in recent studies on various BCN materials.

Copyright 2010 American Physical Society. Available on publisher's site at

Citation Information
Seung Ho Hong, J. C. Williams, Robert J. Twieg, Antal Jakli, et al.. "Second-Harmonic Generation in a Bent-Core Nematic Liquid Crystal" Physical Review E Vol. 82 Iss. 4 (2010)
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