基于液晶包层聚合物波导的移相器分析

Flavio Cornaggia, B. Alam, A. d’Alessandro, R. Asquini
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引用次数: 0

摘要

本文采用两种不同的方法对基于聚合物平台的移相器进行了数值研究。该器件由覆盖有机液晶包层的聚合物槽波导组成,是实现用于计算、通信和传感的聚合物波导系统的一种很有前途的配置。考虑了两种不同的向列液晶,E7和5CB。首先,将二维有限元法与指数椭球理论相结合,间接计算了相移。然后,我们利用三维时域有限差分法研究了信号的传播,从而得到了结构和材料的本征传播损耗。虽然每种方法都引入了特定的近似,需要不同的资源,但两者都给出了相似的结果,并证实了器件的优良品质,即低传播损耗和相关的移相能力。
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Analysis of a phase shifter based on a slot polymeric waveguide with liquid crystal cladding
We numerically investigated a phase shifter based on a polymeric platform by using two different approaches. The device consists of a polymeric slot waveguide covered with an organic liquid crystal cladding, which is a promising configuration for the implementation of polymeric waveguide systems for computation, communication and sensing. Two different nematic liquid crystals have been considered, E7 and 5CB. At first, we have indirectly computed the phase shift through a combination of 2D Finite Element Method with index ellipsoid theory. Then, we have investigated the signal propagation by means of 3D Finite Difference Time Domain Method, which allowed to obtain also the intrinsic propagation loss of the structure and the materials. Although each approach introduces specific approximations and requires different resources, both give similar results and confirm the excellent quality of the device, namely low propagation losses and relevant phase shifting capability.
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