Chromophore Poling in Thin Films of Organic Glasses. 3. Setup for Corona Triode Discharge / Hromoforu Polarizēšana Plānās Organisko Stiklu Kārtiņās 3. Koronas Izlādes Triodes Ierīce

O. Vilitis 1 , E. Titavs 1 , E. Nitiss 1 , and M. Rutkis 1
  • 1 Institute of Solid State Physics, University of Latvia, 8 Ķengaraga Str., Riga, LV-1063, LATVIA

The corona discharge is described focusing on the advantages of corona triode techniques for the direct current (DC) positive poling of optical polymers. The proposed experimental setup allows the corona poling of nonlinear optical (NLO) polymers in the modes of DC constant current (the lowest 1nA) and of the fixed corona-grid voltage, making it possible to carry out the corona-onset poling at elevated temperature (COPET) up to 200 oC. The setup also provides a wide range of the corona discharge voltage (3 kV - 15 kV), variable reciprocal distance of electrodes as well as the possibility to choose from different types of the corona electrode (needle, multi-needle, wire, etc.). By keeping the corona-to-grid voltage constant, a stable corona discharge at electrode is attained. The grid voltage can be varied in the range from 0 to 3kV. The corona poling area on the sample surface is pre-defined by placing ring spacers above it. The setup is completely computerized, allowing both control and monitoring of the corona discharge, which promotes research into the process of charging NLO polymer samples and selection of the optimal poling mode. Using the voltage-current characteristics and the second-harmonic measurements of a poled polymer we also demonstrate the influence of the setup parameters on the efficiency of poling the thin film NLO polymers.

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  • 1. Vilitis, O., Fonavs, E., & Rutkis, M. (2011). Chromophore poling in thin films of organic glasses. Overview of corona discharge application. Latv. J. Phys. Tech. Sci., 48 (6), 53-65.

  • 2. Vilitis, O., Muzikante, I., Rutkis, M.,&. Vembris A. (2012). Chromophore poling in thin films of organic glasses. 2. Two-electrode corona discharge setup. J. Phys. Techn. Sci., 49 (2), 62-70.

  • 3. Dao, P.T., Williams, D.J., McKenna, W.P., & Goppert-Baraducci, K. (1993). Constant current corona charging as a technique for poling organic nonlinear optical thin films and the effect of ambient gas. J. Appl. Phys., 73 (5), 2043-2050.

  • 4. Giacometti, J.A., Fedosov, S., & Costa, M.M. (1999). Corona charging of polymers: Recent advances on constant current charging. Brazilian J. Physics, 29 (2), 269-279.

  • 5. Lee, S.S., Garner, S.M., Chuyanov, V., Zhang, H, Steier, W.H., Wang, F., Dalton, L.R., Udupa, A.H., & Fetterman, H.R. (2000). Optical intensity modulator based on a novel electrooptic polymer incorporating a high μβ chromophore. IEEE J. Quantum Electronics, 36 (5), 527-532.

  • 6. Vembris, A., Rutkis, M., & Laizane, E. (2008). Influence of corona poling procedures on linear and non-linear optical properties of polymer materials containing indandione derivatives as cromophores. SPIE Proceedings, Organic optoelectronics and photonics III, 6999(1).


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