Twisted nematic liquid crystal cells with rubbed poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) films for active polarization control of terahertz waves
Twisted nematic liquid crystal cells with rubbed poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) films for active polarization control of terahertz waves
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DOI：
10.1063/1.4981244
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发表时间：
2017-04
影响因子：
3.2
通讯作者：
T. Sasaki;H. Okuyama;M. Sakamoto;Kohei Noda;H. Okamoto;N. Kawatsuki;H. Ono
中科院分区：
文献类型：
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作者：
T. Sasaki;H. Okuyama;M. Sakamoto;Kohei Noda;H. Okamoto;N. Kawatsuki;H. Ono
我们利用扭曲双折射液晶盒制作了一个太赫兹偏振转换器。在TN液晶盒中，使用涂覆在石英玻璃基底上的聚（3，4-乙撑二氧噻吩）/聚（苯乙烯磺酸盐）（PEDOT/PSS）膜作为电极层。使用人造丝布单向摩擦PEDOT/PSS膜以使PEDOT/PSS LC取向，从而也用作取向层。PEDOT/PSS膜的方位角表面锚定强度使用Neel wall方法测量为5 × 10 - 4 J/m2，这与典型的聚合物取向层的类似。利用Drude-Smith模型对PEDOT/PSS薄膜在THz波段的光学常数进行了表征，结果表明PEDOT/PSS薄膜既可用作THz波段的透明电极，又可用作液晶的取向层。利用偏振可见光激光和THz时域光谱系统研究了所制备的TN液晶盒的电光特性。在标准...
We fabricated a terahertz (THz) polarization converter using a twisted nematic (TN) liquid crystal (LC) cell. Poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) films coated on quartz glass substrates were used as electrode layers in the TN LC cell. The PEDOT/PSS films were rubbed unidirectionally using a rayon cloth to align the nematic LC, thereby also serving as an alignment layer. The azimuthal surface anchoring strength of the PEDOT/PSS films was measured to be 5 × 10−4 J/m2 using the Neel wall method, which is similar to that of typical polymeric alignment layers. The optical constants of the PEDOT/PSS film in the THz range were also characterized using the Drude-Smith model, and the results indicated that the PEDOT/PSS films could be used both as transparent electrodes in the THz range and as alignment layers for the LC. The electro-optical properties of the fabricated TN LC cell were also investigated using a polarized visible laser and THz time-domain spectroscopic system. In par...