Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

被引：16

作者：

Hrozhyk, Uladzimir A. ^{[1
]}

Serak, Svetlana V. ^{[1
]}

Tabiryan, Nelson V. ^{[1
]}

White, Timothy J. ^{[2
]}

Bunning, Timothy J. ^{[2
]}

机构：

[1] Beam Engn Adv Measurements Co, Winter Pk, FL USA

[2] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA

来源：

OPTICAL MATERIALS EXPRESS | 2011年 / 1卷 / 05期

关键词：

PHASE-TRANSITION; PITCH; LASER; BEHAVIOR;

D O I：

10.1364/OME.1.000943

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

The reflection and transmission properties of photosensitized cholesteric liquid crystals (CLCs) are examined. Introduction of mesogenic push-pull azobenzene dyes into blue and green reflective CLCs enables fast (sub-second), photoswitchable optical properties due to the overlap of the trans and cis absorption states. Upon irradiation with CW blue-green laser radiation, the bandgap reflection is erased in a fraction of a second and reversibly restored approximately one second after the blue-green laser radiation is removed. Given the strong overlap of the trans and cis absorption maxima, we believe that repeated trans-cis and cis-trans isomerization cycles induced with irradiation lead to a destruction of the ordered LC phase. The sensitivity to the irradiating wavelength scales with the wavelength-dependent absorption of the mesogenic push-pull dye. A detailed examination of the transmitted and reflected laser beams are presented as a function of power and wavelength of CW sources. (C) 2011 Optical Society of America

引用

页码：943 / 952

页数：10

共 38 条

[1]

SENSITIVITY OF CHOLESTERIC FILMS TO ULTRAVIOLET EXPOSURE [J].

ADAMS, J ;

HAAS, W .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1971, 118 (12) :2026-&

[2]

Influence of helical twisting power on the photoswitching behavior of chiral azobenzene compounds: Applications to high-performance switching devices [J].

Alam, Md. Zahangir ;

Yoshioka, Teppei ;

Ogata, Tomonari ;

Nonaka, Takamasa ;

Kurihara, Seiji .

CHEMISTRY-A EUROPEAN JOURNAL, 2007, 13 (09) :2641-2647

[3]

ANIA F, 1985, MOL CRYST LIQ CRYST, V2, P67

[4]

Electromechanical tuning of cholesteric liquid crystals [J].

Bailey, C. A. ;

Tondiglia, V. P. ;

Natarajan, L. V. ;

Duning, M. M. ;

Bricker, R. L. ;

Sutherland, R. L. ;

White, T. J. ;

Durstock, M. F. ;

Bunning, T. J. .

JOURNAL OF APPLIED PHYSICS, 2010, 107 (01)

[5]

Cholesteric liquid crystal mixtures sensitive to different ranges of solar UV irradiation [J].

Chanishvili, A ;

Chilaya, G ;

Petriashvili, G ;

Barberi, R ;

Bartolino, R ;

De Santo, MP .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2005, 434 :353-366

[6]

Light induced effects in cholesteric mixtures with a photosensitive nexatic host [J].

Chanishvili, A ;

Chilaya, G ;

Petriashvili, G ;

Sikharulidze, D .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2004, 409 :209-218

[7]

Light-controlled change in the helical pitch and broadband tunable cholesteric liquid-crystal lasers [J].

Chilaya, G. S. .

CRYSTALLOGRAPHY REPORTS, 2006, 51 (Suppl 1) :S108-S118

[8]

Simultaneous red-green-blue reflection and wavelength tuning from an achiral liquid crystal and a polymer template [J].

Choi, Su Seok ;

Morris, Stephen M. ;

Huck, Wilhelm T. S. ;

Coles, Harry J. .

ADVANCED MATERIALS, 2010, 22 (01) :53-+

[9]

De Gennes P.G, 1977, The physics of liquid crystals

[10]

Mesogenic versus non-mesogenic azo dye confined in a soft-matter template for realization of optically switchable diffraction gratings [J].

De Sio, Luciano ;

Serak, Svetlana ;

Tabiryan, Nelson ;

Umeton, Cesare .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (19) :6811-6814

← 1 2 3 4 →