一维液晶缺陷光子晶体温度传感器的研究

J4 ›› 2010, Vol. 27 ›› Issue (4): 468-473.

一维液晶缺陷光子晶体温度传感器的研究

钱祥忠

温州大学物理与电子信息工程学院，浙江温州，325035

收稿日期:2009-08-27 修回日期:2009-09-15 出版日期:2010-07-28 发布日期:2010-06-13
通讯作者: 钱祥忠（1963-）,安徽六安人，博士，教授，从事光电信息材料与器件方面的研究。 E-mail:xzhqian@263.net
基金资助:
浙江省自然科学基金项目（Y104457），浙江省科技厅科技计划项目(2007C31025)资助

Temperature sensor of one dimensional liquid crystal defect photonic crystal

QIAN Xiang-zhong

College of Physics and Electrical Information Engineering, Wenzhou University, Wenzhou 325035，China

Received:2009-08-27 Revised:2009-09-15 Published:2010-07-28 Online:2010-06-13

摘要/Abstract

摘要：

将向列相液晶作为缺陷层引入一维光子晶体中，利用液晶折射率对温度变化敏感特性，设计了一维液晶缺陷光子晶体温度传感器。用传输矩阵法研究了传感器的温度特性，并用Matlab编程进行了模拟计算。结果表明，当温度升高时，液晶排列沿平行介质表面的传感器，缺陷峰波长向长波长方向漂移，缺陷模透射峰的宽度减小；而液晶排列沿介质表面法向的传感器，缺陷峰波长则向短波长方向漂移，缺陷模透射峰的宽度增大；传感器的温度灵敏度大于普通材料缺陷的光子晶体，与液晶材料和温度有关，温度接近液晶相变点而增大迅速；传感器缺陷峰波长的漂移与温度成非线性关系。设计了温度传感器探头结构和实验测量系统，测量结果与理论计算值符合。

关键词: 光电子学, 温度传感器, 传输矩阵, 一维光子晶体, 液晶缺陷

Abstract:

Based on one dimensional photonic crystals infiltrated by nematic liquid crystal defect films, by the sensitivity of liquid crystals index on temperature, the temperature sensor of one dimensional liquid crystal defect photonic crystal was proposed. The temperature sensor property was obtained using the transfer matrix method, and was numerical calculated by Matlab program. The results show that the defect peak wavelength move into long wavelength, width of defect mode transmission peaks decrease with liquid crystal parallel medium surface，and the transmission peak wavelength move into short wavelength, width of defect mode transmission peaks increase with liquid crystal perpendicular medium surface. The temperature sensitivity of sensor not only is large than that of common defect, but also is different for different material and temperature, and increase rapid with about the liquid crystal clear point. The moving of the defect peak wavelength is nonlinear with temperature. Using one dimensional liquid crystal defect photonic crystal an experimentation system was set up for temperature measurement. The measure results accord with that of theory.

Key words: optoelectronics, temperature sensor, transfer matrix method, one dimensional photonic crystals, liquid crystals defect

钱祥忠. 一维液晶缺陷光子晶体温度传感器的研究[J]. J4, 2010, 27(4): 468-473.

QIAN Xiang-zhong. Temperature sensor of one dimensional liquid crystal defect photonic crystal[J]. J4, 2010, 27(4): 468-473.

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