Study of the Effect of Nematic Order Degradation in Liquid Crystal-Based Surface Plasmon Resonance Sensors
Study of the Effect of Nematic Order Degradation in Liquid Crystal-Based Surface Plasmon Resonance Sensors
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DOI：
10.3390/photonics4020024
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发表时间：
2017-06-01
期刊：
影响因子：
2.4
通讯作者：
Abuabed, Alaeddin S. A.
中科院分区：
文献类型：
--
作者：
Abuabed, Alaeddin S. A.
提出了一种基于表面等离子体共振（SPR）现象和液晶（LC）敏感层在部分有序状态下的光学传感器的新分析。特别是，本文研究了在LC有序状态的等离子体共振参数的行为退化的影响。LC有序性的退化由序参量表示。当试图区分在LC中响应于基于LC的传感器中的外部刺激的存在的对准的变化和对准的劣化时，顺序参数的显式处理是关键的。当排序减少时，忽略order参数可能会产生误导性的结果。该传感器在化学和生物系统中具有潜在的应用。本文提出了一种对部分有序液晶膜的取向状态和有序度进行跟踪的方法。这可以通过SPR传播常数和金属与LC膜之间的界面处的临界角来实现。
This paper presents a new analysis of optical sensors based on surface plasmon resonance (SPR) phenomenon and nematic liquid crystal (LC) sensitive layer in the partially ordered state. In particular, the paper studies the influence of degradation in the LC ordering state on the behavior of the plasmon resonance parameters. The degradation in the LC ordering is represented by the order parameter. The explicit treatment of the order parameter is critical when trying to differentiate between a change in alignment and a degradation of alignment in LC in response to the presence of an external stimulus in LC based sensors. When a reduction in ordering occurs, ignoring the order parameter can produce misleading results. This sensor has potential applications in chemical and biological systems. The paper presents a tracking method for the state of alignment and degree of ordering of the partially ordered LC film. This can be achieved via the SPR propagation constant and the critical angle at the interface between a metal and an LC film.