Influence of light on self-diffraction process il liquid crystal cells with photoconducting polymeric layers

• Autorzy: Myśliwiec J. , Miniewicz A. , Bartkiewicz S.
• Języki publikacji: EN

Abstrakty

EN

In this paper we present experimental results on the influence of an external light on phase grating recording process in nematic liquid crystal cell with a photoconducting polymeric layer (PVK doped with TNF). Depending on voltage applied to the cell, the external light can amplify or attenuate the diffracted, into first order light power measured in degenerate two-wave mixing experiment. From the time delay between the opening of the external light and the moment of diffraction signal change, we deduce information about the effective charge carriers mobilities in PVK : TNF polymeric layer. We also discuss and present simple explanation of the observed effect.

Słowa kluczowe

EN

nematic liquid crystal panel; self-diffraction; charge carrier mobility; photoconducting polymer

• 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: 53--58
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Myśliwiec J.

autor

Miniewicz A.

autor

Bartkiewicz S.

• Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego Str., 50-370 Wrocław, Poland,

Bibliografia

• 1. 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).
• 2. A. Miniewicz, S. Bartkiewicz, and F. Kajzar, "On the coherent and incoherent image conversion in hybrid polymer liquid crystal structures", Multiphoton and Light Driven Multielectron Processes in Organics: New Phenomena, Materials and Applications, pp. 199-212, edited by F. Kajzar and M. V. Agranovich, NATO S.S. 3/79, Kluwer Academic Publishers, Netherlands, 2000.
• 3. G. Pawlik, A. C. Mitus, and A. Miniewicz, "Monte-Carlo simulations of refractive index change in nematic liquid crystal upon spatially nonuniform illumination", Opt. Com. 182, 249-254 (2000).
• 4. F. Kajzar, S. Bartkiewicz, and A. Miniewicz, "Optical amplification with high gain in hybrid-polymer-liquid-crystal structures", Appl. Phys. Lett. 74, 2924-2926 (1999).
• 5. D. P. West, M. D. Rahn, C. Im, and H. Bässler, "Hole transport through chromophores in a photorefractive polymer composite based on poly(N-vinylcarbazole)", Chem. Phys. Lett, 326, 407-412 (2000).
• 6. I. Biaggio and P. Günter, "Optical characterisation of charge-transport in polar dielectrics by holographic time of flight and space-charge relaxation measurements", Ferroelectrics 223, 397-404 (1999).
• 7. P. M. Borsenberger and D. S. Weiss, in Organic Photoreceptors for Imaging Systems, pp. 227, edited by Marcel Dekker, Inc., ew York, 1993.