Photorefractivity of dye-doped NLC layers and possibility of their application

• Autorzy: Parka J.
• Języki publikacji: EN

Abstrakty

EN

Photorefractive properties and possibility of guest-host effect application for real time holography have been described. Isothiocyanate nematic liquid mixtures with positive dielectric anisotropy as hosts while antraquinone dyes as guests were used. In dye-doped nematic liquid crystals high diffraction efficiency approaching 20% were obtained. Fast optical grating formation with thee time constant of a few ms have been observed. The dependence of grating formation on strength of applied dc and low frequency of ac electric field, configuration of light polarisation and nematic director orientation were reported.

Słowa kluczowe

EN

photorefractivity of dye-doped nematic liquid crystals; holographic gratings; real-time holography

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2002
• Tom: Vol. 10, No. 1
• Strony: 83--87
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Parka J.

• Institute of Applied Physics, Military Universisty of Technology, 2 Kaliski Str., 00-908 Warsaw, Poland,

Bibliografia

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• 5. F. Simoni, Nonlinear Optical Properties of Liquid Crystals and Polymer Dispersed Liquid Crystals, World Scientific Publishing Co. Pte. Ltd., Singapur 1997.
• 6. P. Wiederrecht, M. R. Wasilewski, T. Galili, and H. Levenon, "Charge transfer reactions in nematic liquid crystals," Proc. SPIE 3475, 102-110 (1998).
• 7. A. Miniewicz, J. Parka, S. Battkiewicz, and A. Januszko, "Liquid crystals as materials for real time holography," Pure and Appl. Opt. 7, 179-189 (1998).
• 8. J. Parka, A. Januszko, A. Miniewicz, and J. Żmija, "Holographic grating formation in dye doped nematic liquid crystal thin layer under DC electric field, Proc. SPIE 4147, 330-335 (2000).
• 9. J. Parka, A. Miniewicz, A. Januszko, Y. Reznikov, R. Dąbrowski, and Z. Stolarz, "Influence of nematic liquid crystal with dye and cell construction pararneters on dynamic holographic grating formation," Proc. SPIE 4147, 355-399 (2000).
• 10. K. Komorowska, A. Miniewicz, and J. Parka, "Holographic grating recording in large area photoconducting liquid crystal panels," Synthetic Metals 109, 189-193 (2000).
• 11. J. Parka, "Investigation of physical and electrooptical properties of liquid crystal guest-host nematic mixtures system for dynamic holography," Proc. SPIE 4101, 97-101 (2000).
• 12. S. Serak, J. Parka, A. Agaskhov, and T. Davidovich, "Photoinduced electrohydrodynamical instabilities in antraquinone-dye-doped nematics above Freedericksz threshold," Proc. SPIE 4147, 340-345 (2000).
• 13. A. Agashkov, J. Parka, S. Serak, and T. Davidovich, "Ordering of ac electric-field-induced domain in dye-doped nematics under photo-excitation," Proc. SPIE 4418, 54-59 (2001).
• 14. T. Grudniewski, M. Sutkowski, J. Parka, and A. Miniewicz, "The digital hologram projected in LC cells," Biuletyn WAT LIl, 121-131, 2002.