Investigations of dynamic photorefractivity regime by optical polarizing microscopy

• Autorzy: Agashkov A. V. , Kovalev A. A. , Parka J.
• Języki publikacji: EN

Abstrakty

EN

We present a technique, based on optical polarizing microscopy, and results of direct observation of the optical interference field effect on the transient domains excited by ac electric field in a nematic planar cell with photosensitive aligning layers. The light source used in a microscope operated in DC mode as well as in triggered pulse one. Obtained microscopic snapshots of transient domain structure confirmed our assumption of the transient domains reordering (trapping) by the low intensity optical interference field.

Słowa kluczowe

EN

liquid crystal 6CHBT; photosensitive aligning layers; dynamic photorefractivity; ac electric field; optical interference field; transient domain structure; polarizing microscopy

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2009
• Tom: Vol. 17, No. 2
• Strony: 99--104
• Opis fizyczny: Bibliogr. 45 poz., wykr., il.

Twórcy

autor

Agashkov A. V.

autor

Kovalev A. A.

autor

Parka J.

• Institute of Physics, Belarus National Academy of Sciences, Pr. Nezavisimosti 68, 220072 Minsk, Belarus,

Bibliografia

• [1] P. Yeh, Introduction to Photorefractive Nonlinear Optics, Wiley Interscience, New York, 1993.
• [2] I. Janossy and T. Kosa: Influence of anthraquinone dyes on optical reorientation of nematic liquid crystals. Opt. Lett. 17, 1183-1185 (1992).
• [3] E. V. Rudenko and A. V. Sukhov: Optically induced spatial charge separation in a nematic and the resultant orientational nonlinearity. JETP 105, 1621-1634 (1994). (in Russian)
• [4] E. V. Rudenko and A. V. Sukhov: Photoinduced electrical conductivity and photorefraction in a nematic liquid crystal. JETP Lett. 59, 133-136 (1994). (in Russian)
• [5] I. C. Khoo, H. Li, and Y. Liang: Observation of orientational photorefractive effects in nematic liquid crystals. Opt. Lett. 19, 1723-1725 (1994).
• [6] I. C. Khoo: Holographic grating formation in dye- and fullerene C60-doped nematic liquid-crystal film. Opt. Lett. 20, 2137-2139 (1995).
• [7] G. P. Wiederrecht, B. A. Yoon, and M. R. Wasilewski: High photorefractive gain in nematic liquid crystals doped with electron donor and acceptor molecules. Science 270, 1794-1797, 1995.
• [8] I. C. Khoo: Orientational photorefractive effects in nematic liquid crystal film. IEEE J. Quantum Elect. 32, 525-534, 1996.
• [9] I. C. Khoo: Optical-dc-field induced space charge fields and photorefractive-like holographic grating formation in nematic liquid crystals. Mol. Cryst. Liq. Cryst. 282, 53-66, 1996.
• [10] I. C. Khoo, B. D. Guenther, M. V. Wood, P. Chen, and M. Y. Shih: Coherent beam amplification with a photorefractive liquid crystal. Opt. Lett. 22, 1229-1231, 1997.
• [11] L. Marucci, D. Paparo, D. Maddalena, E. Massera, E. Prudnikova, and E. Santamato: Role of guest-host intermolecular forces in photoinduced reorientation of dyed liquid crystals. J. Chem. Phys. 107, 9783-9793, 1997.
• [12] L. Marucci, D. Paparo, G. Abbate, E. Santamato, M. Kreuzer, P. Lehnert, and T. Vogeler: Enhanced optical nonlinearity by photoinduced molecular orientation in absorbing liquids. Phys. Rev. A58, 4926-4936, 1998.
• [13] I. C. Khoo, S. Slussarenko, B. D. Guenther, M. Y. Shih, P. Chen, and M. V. Wood: Optically induced space-charge fields, dc voltage, and extraordinary large nonlinearity in dye-doped nematic liquid crystals. Opt. Lett. 23, 253-255, 1998.
• [14] I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen: Extremely nonlinear photosensitive liquid crystals for image sensing and sensor protection. Opt. Express 4, 432-442, 1999.
• [15] G. Zhang, G. Montemezzani, and P. Günter: Orientational photorefractive effect in nematic liquid crystal with externally applied fields. J. Appl. Phys. 88, 1709-1717, 2000.
• [16] L. Marucci, D. Paparo, M. R. Vetrano, M. Colicchio, and E. Santamato: Role of dye structure in photoinduced reorientation of dye-doped liquid crystals. J. Chem. Phys. 113, 10361-10366, 2000.
• [17] M. Kaczmarek, M. Y. Shih, R. S. Cudney, and I. C. Khoo: Electrically tunable, optically induced dynamics and permanent grating in dye-doped liquid crystals. IEEE J. Quantum Elect. 38, 451-457, 2002.
• [18] I. C. Khoo, J. Ding, Y. Zhang, K. Chen, and A. Diaz: Supra-nonlinear photorefractive response of single-walled carbon nanotubeand C60-doped nematic liquid crystal. Appl. Phys. Lett. 82, 3587-3589, 2003.
• [19] H. Ono and N. Kawatsuki: High-performance photorefractivity in highand low-molar-mass liquid crystal mixtures. J. Appl. Phys. 85, 2482-2487, 1999.
• [20] H. Ono and N. Kawatsuki: Orientational holographic grating observed in liquid crystals sandwiched with photocon-ducting polymer films. Appl. Phys. Lett. 71, 1162-1164, 1997.
• [21] N. V. Tabiryan and C. Umeton: Surface-activated photorefractivity and electro-optic phenomena in liquid crystals. J. Opt. Soc. Am. B 15, 1912-1917, 1998.
• [22] S. Bartkiewicz, A. Miniewicz, F. Kajzar, and M. Zagórska: Enhanced photorefractive effect in hybrid conducting polymer-liquid crystal structures. Mol. Cryst. Liq. Cryst. 322, 9-20, 1998.
• [23] A. Miniewicz, S. Bartkiewicz, and F. Kajzar: On the dynamics of coherent amplification of light observed in liquid crystal panel with photoconducting polymeric layers. Nonlinear Opt. 19, 157-175, 1998.
• [24] A. Miniewicz, S. Bartkiewicz, F. Kajzar, and M. Zagórska: All-optical switching of light in hybrid liquid crystal structures. Nonlinear Opt. 21, 99-114, 1998.
• [25] S. A. Choi, J. Mun, C. S. Yoon, and J. D. Kim: Layer-structured photorefractive composite containing nematic liquid crystal (E7)-C60-PVK (Poly (N-Vinylcarbazole)). Mol. Cryst. Liq. Cryst. 337, 329-332, 1999.
• [26] J. Parka, A. Januszko, A. Miniewicz, and J. Żmija: Holographic grating formation mechanism in dye doped nematic liquid crystal thin layer under dc electric field. Proc. SPIE. 4147, 330-334, 2000.
• [27] J. Zhang, V. Ostroverkhov, K.D. Singer, V. Reshetnyak, and Yu. Reznikov: Electrically controlled surface diffraction gratings in nematic liquid crystals. Opt. Lett. 25, 414-416, 2000.
• [28] V. Boichuk, S. Kucheev, J. Parka, V. Reshetnyak, Yu. Reznikov, I. Shiyanovskaya, K.D. Singer, and S. Slussarenko: Surface-mediated light-controlled Friedericksz transition in a nematic liquid crystal cell. J. Appl. Phys. 90, 5963-5967, 2001.
• [29] P. Pagliusi and G. Cipparrone: Surface-induced photorefractive-like effect in pure liquid crystals. Appl. Phys. Lett. 80, 168-170, 2002.
• [30] P. Klysubun and G. Indebetouw: Transient and steady state photorefractive responses in dye-doped nematic liquid crystal cells. J. Appl. Phys. 91, 897-903, 2002.
• [31] P. Pagliusi and G. Cipparrone: Charge transport due to photoelectric interface activation in pure nematic liquid-crystal cells. J. Appl. Phys. 92, 4863-4869, 2002.
• [32] T. Grudniewski, J. Parka, R. Dąbrowski, A. Januszko, and A. Miniewicz: Investigations of the diffraction efficiency in dye-doped LC cells under low frequency AC voltage. Opto-Electron. Rev. 10, 11-15, 2002.
• [33] J. Myśliwiec, A. Miniewicz, and S. Bartkiewicz: Influence of light on self-diffraction process in liquid crystal cells with photoconducting polymeric layers. Opto-Electron. Rev. 10, 53-58, 2002.
• [34] A. Petrossian and S. Residori: Surfactant enhanced reorientation in dye-doped nematic liquid crystals. Electrophys. Lett. 60, 79-85, 2002.
• [35] W. Lee, H. Y. Chen, and S. L. Yeh: Surface-sustained permanent gratings in nematic liquid crystals doped with carbon nanotubes. Opt. Express. 10, 482-487, 2002.
• [36] A. Miniewicz, F. Michelotti and A. Belardini: Photoconducting polymer-liquid crystal structure studied by electro-reflectance. J. Appl. Phys. 95, 1141-1147, 2004.
• [37] P. Korneichuk, Yu. Reznikov, O. Tereschenko, and V. Reshetnyak: Surface-mediated beam coupling in nominally pure nematic liquid crystal. Mol. Cryst. Liq. Cryst. 422, 27-36, 2004.
• [38] M. Kaczmarek, A. Dyadyusha, S. Slussarenko, and I. C. Khoo: The role of surface charge field in two-beam coupling in liquid crystal cells with photoconducting polymer layers. J. Appl. Phys. 96, 2616-2623, 2004.
• [39] L. Luccetti, M. Gentili, and F. Simoni: Colossal optical nonlinearity induced by a low frequency external electric field in dye-doped liquid crystals. Opt. Express. 14, 2236-2241, 2006.
• [40] A. Agashkov, J. Parka, S. Serak, and T. Davidovich: Ordering of ac electric-field-induced domains in dye-doped nematics under photo-excitation. Proc. SPIE. 4418, 54-59, 2001.
• [41] A. V. Agashkov, A. A. Kovalev, S. V. Serak, and J. Parka: Effect of optical nonlinearity dynamical enhancement in dye doped liquid crystal under ac electrical field. Mol. Cryst. Liq. Cryst. 375, 269-280, 2002.
• [42] A. Agashkov, A. Kovalev, and J. Parka: Dynamic photorefractivity in nematic liquid crystals panels with photoconducting polymeric layers. Opto-Electron. Rev. 12, 271-275, 2004.
• [43] A. Agashkov, A. Kovalev, and J. Parka: Index grating surface anchoring. Proc. SPIE. 5947, 257-265, 2005.
• [44] L. M. Blinov, Electro-Optical and Magneto-Optical Properties of Liquid Crystals, John Wiley & Sons, Chichester, 1983.
• [45] A. V. Agashkov, A. A. Kovalev, and J. Parka: Effect of space charge transport on dynamic photorefractivity. Proc. SPIE. 6725, 672511, 2007. (available at http://spiedl.aip.org).