科研之友
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摘要
The use of photorefractive layers in liquid crystal cells to achieve beam coupling typically requires an applied DC field to achieve high gain. In hybrid cells, with PVK:C60 polymer sandwiched with nematic liquid crystals, this limitation can be lifted by using a low-frequency AC field. AC fields with frequencies between 1 and 10 Hz lead to gain values that are larger than those at equivalent DC fields. The optical response of the hybrid liquid crystal system to the AC field can be understood using a simple impedance ladder model.
- 出版日期2011-7
