ELECTRIC-FIELD-MODULATED REFLECTIVITY AT A LIQUID-CRYSTAL-SUBSTRATE INTERFACE

被引：1

作者：

TRIPATHI, S ^{[1
]}

PETSCHEK, RG ^{[1
]}

ROSENBLATT, C ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV, DEPT MACROMOLEC SCI, CLEVELAND, OH 44106 USA

来源：

PHYSICAL REVIEW A | 1992年 / 45卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.45.R3387

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Measurements of reflectivity versus ac electric field E were performed in the nematic phase of octylcyanobiphenyl homeotropically aligned between two indium tin oxide-coated glass slides. The change in reflectivity delta-R was found to be linear in E, with d(delta-R)/dE increasing monotonically toward the nematic-isotropic transition temperature. In addition, the phase of delta-R at the front and back surfaces differed by pi. Such an effect will arise from order electricity, whereby a term proportional to the product of the electric field and the gradient of the nematic order parameter appears in the bulk free energy. This term integrates to yield a pair of surface terms such that there is a linear change in the order parameter close to the interface. Similar terms will also arise from ferroelectric interactions at the surface.

引用

页码：R3387 / R3390

页数：4

共 26 条

[1] SMECTIC-A ORDER AT THE SURFACE OF A NEMATIC LIQUID-CRYSTAL - SYNCHROTRON X-RAY-DIFFRACTION [J].

ALSNIELSEN, J ;

CHRISTENSEN, F ;

PERSHAN, PS .

PHYSICAL REVIEW LETTERS, 1982, 48 (16) :1107-1110

[2] ORDER ELECTRICITY AND SURFACE ORIENTATION IN NEMATIC LIQUID-CRYSTALS [J].

BARBERO, G ;

DOZOV, I ;

PALIERNE, JF ;

DURAND, G .

PHYSICAL REVIEW LETTERS, 1986, 56 (19) :2056-2059

[3] EXPERIMENTAL STUDIES OF THE ANCHORING ENERGY OF NEMATIC LIQUID-CRYSTALS - INVITED LECTURE [J].

BLINOV, LM ;

KABAYENKOV, AY ;

SONIN, AA .

LIQUID CRYSTALS, 1989, 5 (02) :645-661

[4] ORIENTATIONAL WETTING BEHAVIOR OF A LIQUID-CRYSTAL HOMOLOGOUS SERIES [J].

CHEN, W ;

MARTINEZMIRANDA, LJ ;

HSIUNG, H ;

SHEN, YR .

PHYSICAL REVIEW LETTERS, 1989, 62 (16) :1860-1863

[5] STRUCTURAL TRANSITION AT THE FREE-SURFACE OF THE NEMATIC LIQUID-CRYSTALS MBBA AND EBBA [J].

CHIARELLI, P ;

FAETTI, S ;

FRONZONI, L .

JOURNAL DE PHYSIQUE, 1983, 44 (09) :1061-1067

[6] CRITICAL-BEHAVIOR OF THE ANCHORING ENERGY OF THE DIRECTOR AT THE FREE-SURFACE OF A NEMATIC LIQUID-CRYSTAL [J].

CHIARELLI, P ;

FAETTI, S ;

FRONZONI, L .

PHYSICS LETTERS A, 1984, 101 (01) :31-34

[7] BEHAVIOR OF THE ANCHORING STRENGTH COEFFICIENT NEAR A STRUCTURAL TRANSITION AT A NEMATIC SUBSTRATE INTERFACE [J].

DILISI, GA ;

ROSENBLATT, C ;

GRIFFIN, AC ;

HARI, U .

LIQUID CRYSTALS, 1990, 7 (03) :353-360

[8] SMECTIC-O FILMS [J].

GALERNE, Y ;

LIEBERT, L .

PHYSICAL REVIEW LETTERS, 1990, 64 (08) :906-909

[9]

GRAMSBERGEN EF, 1988, J PHYS-PARIS, V49, P363, DOI 10.1051/jphys:01988004902036300

[10] SURFACE POLAR ORDERING IN A LIQUID-CRYSTAL OBSERVED BY OPTICAL 2ND-HARMONIC GENERATION [J].

GUYOTSIONNEST, P ;

HSIUNG, H ;

SHEN, YR .

PHYSICAL REVIEW LETTERS, 1986, 57 (23) :2963-2966

← 1 2 3 →