Optical switching and alignment of antiferroelectric liquid crystals containing an azo group

The optical properties of two kinds of photochromic antiferroelectric liquid crystal (AFLC) containing an azo group have been examined. Depending on the substituting group at the chiral centre, these AFLCs showed different photoinduced phase transitions by Ar+ laser light irradiation. This phase transition has led to a new form of optical switching controlled by a bias voltage. In addition, it was found that these AFLCs caused an azimuthal photoalignment effect regulated by linearly polarized Ar+ laser light irradiation. These phenomena were applied to image storage.

[1]  R. Lemieux,et al.  Photomodulation of the Spontaneous Polarization of a Ferroelectric Liquid Crystal: Harnessing the Transverse Dipole Modulation of a Chiral Thioindigo Dopant , 1997 .

[2]  I. Yamaguchi,et al.  Optical Switching of Antiferroelectric Liquid Crystal with Azo-Dye Using Photochemically Induced SmC*A-SmC* Phase Transition. , 1997 .

[3]  M. Ozaki,et al.  Smectic Layer Rotation in the Smectic A Phase of Ferroelectric and Antiferroelectric Liquid Crystals , 1996 .

[4]  T. Ikeda,et al.  Synthesis and Photochemical Switching of the Antiferroelectric Liquid Crystals Containing a Diazenediyl Group. , 1996 .

[5]  M. Aizawa,et al.  Photochemical Switching of Ferroelectric Liquid Crystals Using a Photoswitchable Chiral Dopant , 1996 .

[6]  H. Coles,et al.  Photomechanically induced ferroelectricity in smectic liquid crystals , 1994 .

[7]  Y. Takanishi,et al.  Optically Addressed Spatial Light Modulator Using an Antiferroelectric Liquid Crystal Doped with Azobenzene , 1993 .

[8]  Yoichi Takanishi,et al.  Self-Recovery from Alignment Damage under AC Fields in Antiferroelectric and Ferroelectric Liquid Crystal Cells , 1991 .

[9]  T. Kurokawa,et al.  Real-time hologram construction and reconstruction using a high-resolution spatial light modulator , 1991 .

[10]  Kristina M. Johnson,et al.  Optical phase conjugation using optically addressed chiral smectic liquid crystal spatial light modulators , 1991 .

[11]  Kristina M. Johnson,et al.  Joint transform correlator using an amorphous silicon ferroelectric liquid crystal spatial light modulator , 1990 .

[12]  T. Todorov,et al.  Polarization holography. 1: A new high-efficiency organic material with reversible photoinduced birefringence. , 1984, Applied optics.

[13]  H. Takezoe,et al.  Direct Method with Triangular Waves for Measuring Spontaneous Polarization in Ferroelectric Liquid Crystals , 1983 .

[14]  Jan Grinberg,et al.  A new real-time non-coherent to coherent light image converter - The hybrid field effect liquid crystal light valve , 1975 .

[15]  Manfred Eich,et al.  Reversible digital and holographic optical storage in polymeric liquid crystals , 1987 .

[16]  R. Meyer,et al.  Electroclinic effect at the A-C phase change in a chiral smectic liquid crystal , 1979 .