Orientational photoreactive effects in nematic liquid crystals on silver sulfide thin films

Emoto, Akira; Maeda, Kazuya; Tanaka, Kunihiko; Kawatsuki, Nobuhiro; Ono, Hiroshi
July 2010
Applied Physics Letters;7/26/2010, Vol. 97 Issue 4, p041919
Academic Journal
We present a highly functionalized photorefractive device consisting of fullerene (C60)-doped nematic liquid crystals (NLCs) on silver sulfide thin films. Either stable holograms or real-time holography is possible depending on the polarity of an external electric field. When certain direction of external field is applied to the device under irradiation by interference field, photoexcited charges are recombined with silver ions at the boundary between the silver sulfide and NLCs. The resulting interface structures reorient the NLC molecules and holographic gratings are stably memorized. When the polarity of the external field is reversed, normal photorefractive holographic gratings are formed.


Related Articles

  • High-performance photorefractivity in high- and low-molar-mass liquid crystal mixtures. Ono, Hiroshi; Kawatsuki, Nobuhiro // Journal of Applied Physics;3/1/1999, Vol. 85 Issue 5, p2482 

    Presents information on a study which observed the high-performance photorefractivity in a thick-grating regime in high- and low-molar-mass liquid crystal mixtures doped with fullerene. Experimental details; Results and discussion; Conclusions.

  • Orientational photorefractive effects observed in poly(vinyl alcohol)/liquid crystal composites. Ono, Hiroshi; Saito, Isao; Kawatsuki, Nobuhiro // Applied Physics B: Lasers & Optics;1998, Vol. 66 Issue 4, p527 

    Abstract. We successfully observed orientational photorefractive gratings generated in poly(vinyl alcohol) (PVA)/liquid crystal (LC) composites doped with a fullerene (C[sub 60]) as a photoconductive sensitizer under an applied dc field. Orientational photorefractivity was demonstrated by...

  • Supra-nonlinear photorefractive response of single-walled carbon nanotube- and C[sub 60]-doped nematic liquid crystal. Khoo, I. C.; Ding, J.; Zhang, Y.; Chen, K.; Diaz, A. // Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3587 

    We have observed an extremely large electro-optically induced photorefractive effect in nematic liquid crystal doped with single-walled carbon nanotubes and fullerene C[sub 60]. The effective refractive index change coefficient can be as large as 7 cm²/W, which is >1000 times larger than...

  • Beam coupling in hybrid photorefractive inorganic-cholesteric liquid crystal cells: Impact of optical rotation. Reshetnyak, V. Yu.; Pinkevych, I. P.; Sluckin, T. J.; Cook, G.; Evans, D. R. // Journal of Applied Physics;2014, Vol. 115 Issue 10, p103103-1 

    We develop a theoretical model to describe two-beam energy exchange in a hybrid photorefractive inorganic-cholesteric cell. A cholesteric layer is placed between two inorganic substrates. One of the substrates is photorefractive (Ce:SBN). Weak and strong light beams are incident on the hybrid...

  • Recording of Thin Phase Holograms in Polymer-Dispersed Liquid-Crystal Composites Based on Fullerene-Containing Ï€-Conjugated Organic Systems. Kamanina, N. V.; Sizov, V. N.; Stasel’ko, D. I. // Optics & Spectroscopy;Jan2001, Vol. 90 Issue 1, p1 

    The recording of thin phase holograms in promising fullerene-containing, polymer-dispersed liquid-crystal composites based on 2-cyclooctylamino-5-nitropyridine and N-(4-nitrophenyl)-(L)-prolinol using picosecond laser pulses is studied for the first time. The anisotropy of the refractive index...

  • Measurement of the electrogyratory coefficient in photorefractive Bi12SiO20 crystal. Nakagawa, Kiyoshi; Kajita, Nobuyuki; Chen, Jing; Minemoto, Takumi // Journal of Applied Physics;1/15/1991, Vol. 69 Issue 2, p954 

    Investigates the effect of electrogyratory on the Bi[sub12]SiO[sub20] (BSO) single crystal by measuring the change of the polarization state of a light passing through a thick BSO single-crystal plate. Linear electrogyratory coefficient in the BSO crystal; Applications of the photorefractive...

  • Optically switchable biphotonic photorefractive effect in dye-doped liquid crystal films. Lee, Mei-Ru; Jyun-Ruei Wang; Chia-Rong Lee; Andy Y.-G. Fuh // Applied Physics Letters;12/13/2004, Vol. 85 Issue 24, p5822 

    This study reports the optically swichable photorefractive (PR) effect induced in a biphotonic grating in the presence of an applied dc voltage, in an azo-dye-doped liquid crystal (LC) film. When one green light is switched on (off), the PR grating can be turned on (off) by irradiating an...

  • Photorefractive holographic contrast enhancement via increased birefringence in polymer... Rahn, Mark D.; West, David P. // Journal of Applied Physics;1/15/2000, Vol. 87 Issue 2, p627 

    Provides information on a study which focused on the use of the birefringence of a photorefractive polymer composite in response to an electric field to predict the holographic index contrast attainable. Photorefractive polymer device construction; Holographic index contrast and birefringence...

  • Photorefractive properties in homogeneous and heterogeneous polymer/liquid crystal composites. Bai, Y.; Chen, X.; Wan, X.; Zhou, Q.-F.; Liu, H.; Zhang, B.; Gong, Q. // Applied Physics B: Lasers & Optics;2001, Vol. 73 Issue 1, p35 

    The photorefractivity of a photorefractive composite consisting of poly(N-vinylcarbazole) (PVK) doped with a non-room-temperature liquid crystal, 4-butyloxy-4�-cyanobiphenyl (4OCB), and C[sub 60] was studied by means of measuring the two-beam coupling coefficients. The results show that the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics