Second-harmonic generation in a bent-core nematic liquid crystal

被引：17
|
作者：
Hong, S. H. [1 ]
Williams, J. C. [2 ]
Twieg, R. J. [2 ]
Jakli, A. [3 ,4 ]
Gleeson, J. [1 ]
Sprunt, S. [1 ]
Ellman, Brett [1 ]
机构：
[1] Kent State Univ, Dept Phys, Kent, OH 44242 USA
[2] Kent State Univ, Dept Chem, Kent, OH 44242 USA
[3] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA
[4] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA
来源：
PHYSICAL REVIEW E | 2010年 / 82卷 / 04期
关键词：
RAYLEIGH-SCATTERING; MOLECULES; TENSOR; SPHERE; MEDIA; PHASE;
D O I：
10.1103/PhysRevE.82.041710
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
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.
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页数：9
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