Publication Title

Physical Review E

Publication Date

10-25-2010

Document Type

Article

DOI

10.1103/PhysRevE.82.041710

Keywords

harmonic-generation, centrosymmetric material, Rayleigh-scattering, phase, molecules, tensor, sphere, media

Disciplines

Physics

Abstract

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.

Comments

Copyright 2010 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.82.041710


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