Polar structure in a ferroelectric bent-core mesogen as studied by second-harmonic generation

被引：31

作者：

Araoka, F ^{[1
]}

Thisayukta, J ^{[1
]}

Ishikawa, K ^{[1
]}

Watanabe, J ^{[1
]}

Takezoe, H ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

PHYSICAL REVIEW E | 2002年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.66.021705

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-harmonic generation (SHG) measurements have been conducted in the ferroelectric liquid crystalline phase of a chiral bent-core molecule, P-8-OPIMB6(*). Well-aligned cells were obtained by applying an electric field parallel to the substrate surfaces. In-plane anisotropy of the SHG signal observed at normal incidence of light shows two- or four-leaf patterns depending on polarization conditions, indicating a ferroelectric uniform structure. The detailed analysis of the data by taking account of optical anisotropy in the SHG active bulk leads to the determination of nonlinear susceptibility tensor components, d(333)=14.4 pm/V and d(311)=49.2 pm/V. Using the d coefficients thus determined, the hyperpolarizability tensor components of the molecule are also determined as beta(zzz)=14.5x10(-30) esu and beta(zxx)=67.6x10(-30) esu. These values well agree with those of the achiral homolog P-12-OPIMB previously determined by hyper-Rayleigh scattering.

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页数：5

相关论文

共 30 条

[1] Evaluation of the first-order hyperpolarizability tensor of bent molecules by means of hyper-Rayleigh scattering method [J].

Araoka, F ;

Park, B ;

Kinoshita, Y ;

Ishikawa, K ;

Takezoe, H ;

Thisayukta, J ;

Watanabe, J .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1999, 38 (6A) :3526-3529

[2] OPTICAL 2ND HARMONIC-GENERATION IN VARIOUS LIQUID-CRYSTALLINE PHASES [J].

BARNIK, MI ;

BLINOV, LM ;

DOROZHKIN, AM ;

SHTYKOV, NM .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1983, 98 (1-4) :1-12

[3]

BEDAL JP, 1999, MOL CRYST LIQ CRYST, V332, P163

[4] Second-harmonic generation in achiral bent-shaped liquid crystals [J].

Choi, SW ;

Kinoshita, Y ;

Park, B ;

Takezoe, H ;

Niori, T ;

Watanabe, J .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1998, 37 (6A) :3408-3411

[5] Novel chiral bis-dipolar 6,6'-disubstituted binaphthol derivatives for second-order nonlinear optics. Synthesis and linear and nonlinear optical properties [J].

Deussen, HJ ;

Hendrickx, E ;

Boutton, C ;

Krog, D ;

Clays, K ;

Bechgaard, K ;

Persoons, A ;

Bjornholm, T .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (29) :6841-6852

[6] Structure and properties of liquid crystalline phases formed by achiral banana-shaped molecules [J].

Diele, S ;

Grande, S ;

Kruth, H ;

Lischka, CH ;

Pelzi, G ;

Weissflog, W ;

Wirth, I .

FERROELECTRICS, 1998, 212 (1-4) :169-177

[7]

Furukawa T., 1996, Nonlinear Optics, Principles, Materials, Phenomena, and Devices, V15, P167

[8] Ferroelectric phases in a chiral bent-core smectic liquid crystal: Dielectric and optical second-harmonic generation measurements [J].

Gorecka, E ;

Pociecha, D ;

Araoka, F ;

Link, DR ;

Nakata, M ;

Thisayukta, J ;

Takanishi, Y ;

Ishikawa, K ;

Watanabe, J ;

Takezoe, H .

PHYSICAL REVIEW E, 2000, 62 (04) :R4524-R4527

[9] 2ND-HARMONIC GENERATION IN CENTROSYMMETRIC MOLECULAR FILMS - ANALYSIS UNDER ANISOTROPIC CONDITIONS [J].

HOSHI, H ;

YAMADA, T ;

ISHIKAWA, K ;

TAKEZOE, H ;

FUKUDA, A .

PHYSICAL REVIEW B, 1995, 52 (16) :12355-12365

[10] Second harmonic generation (SHG) investigations of different phases of banana shaped molecules [J].

Kentischer, F ;

MacDonald, R ;

Warnick, P ;

Heppke, G .

LIQUID CRYSTALS, 1998, 25 (03) :341-347