SiO2-Al2O3-SiO2光子晶体缺陷腔的折射率传感特性

陈颖; 卢波; 范卉青

doi:doi:10.3788/cjl201441.0605003

中国激光, 2014, 41 (6): 0605003, 网络出版: 2014-04-23

SiO₂-Al₂O₃-SiO₂光子晶体缺陷腔的折射率传感特性

Refractive Index Sensing Property of SiO₂-Al₂O₃-SiO₂ Photonic Crystal Defect Cavity

论文大纲

陈颖 ^1,2,*卢波 ¹范卉青 ¹

作者单位

¹ 燕山大学电气工程学院自动化仪表系, 河北秦皇岛 066004

² 燕山大学测试计量技术及仪器河北省重点实验室, 河北秦皇岛 066004

摘要

为了提高光子晶体折射率传感器的灵敏度和品质因数，提出了一种基于表面波谐振原理的缺陷态光子晶体棱镜耦合传感结构。通过分层传输矩阵法对该结构建立传感理论模型，得出古斯汉欣位移与谐振波长的变化关系，从而建立谐振波长与待测样本折射率的关系模型。以SiO2-Al2O3-SiO2作为缺陷腔来代替传统表面等离子体共振(SPR)传感器中的金膜，构成折射率敏感层；采用Al2O3作为吸收层，从而在反射光谱中得到谐振缺陷峰，通过缺陷峰值的漂移实现待测样本折射率的动态监测；以乙二醇溶液为待测样本，对该折射率传感结构的Q值及灵敏度进行了分析。结果表明，其灵敏度约为3596 nm·RIU-1(RIU为相对折射率单位)，Q值约为1087.7，证明了结构设计的有效性，并可为高灵敏度和高Q值折射率传感器的设计提供一定的理论指导。

Abstract

To improve the sensitivity and the Q value of the photonic crystal refractive index sensor, a coupling structure combining the defect photonic crystal and the prism based on surface wave resonance theory is proposed. The sensing theoretical model is established by the layered transfer matrix method and the relationship between the Goos-Hnchen shift and the resonant wavelength is obtained, which can deduce the relationship model between the resonant wavelength and the refractive index of the sample detected. The SiO2-Al2O3-SiO2 structure is regarded as the defect cavity, which is replaced by the gold film in conventional surface plasmon resonance (SPR) sensor. Al2O3 is adopted as the absorbed layer, and then the resonant defect peak wavelength can be obtained and the dynamic detection of the refractive index of sample can be achieved from the shift of the resonant defect peak wavelength. The ethylene glycol is adopted as the sample detected and the Q value and the sensitivity of the refractive index sensing structure are discussed. The simulation results show that the sensitivity can attain to 3596 nm·RIU-1 (RIU is refractive index unit) and the Q value is 1087.7 approximately, which demonstrates the effectiveness of the sensing structure. The design scheme can provide certain theoretical guidance for high sensitivity and high Q value sensor design.

参考文献

[1] Yingcai Wu, Zhengtian Gu. Research on the thermo-characteristics of surface plasmon resonance spectrum[J]. Chin Opt Lett, 2012, 10(8): 081301.

[2] 吴平辉, 顾菊观, 刘彬, 等. 波长检测型表面等离子体共振传感器的实验研究[J]. 激光与光电子学进展, 2012, 49(2): 022501.

Wu Pinghui, Gu Juguan, Liu Bin, et al.. Experimental research on wavelength modulation surface plasmon resonance sensor[J]. Laser & Optoelectronics Progress, 2012, 49(2): 022501.

[3] V Paeder, V Musi, L Hvozdara, et al.. Detection of protein aggregation with a Bloch surface wave based sensor[J]. Sensors and Actuators B, 2011, 157(1): 260-264.

[4] 冯琛, 冯国英, 周昊, 等. 一维光子带隙光子晶体激光腔的特性分析[J]. 中国激光, 2012, 39(8): 0802009.

Feng Chen, Feng Guoying, Zhou Hao, et al.. Characteristic analysis on photonic crystal laser cavity with one-dimensional photonic bandgap[J]. Chinese J Lasers, 2012, 39(8): 0802009.

[5] 陈元浩, 刘桂强, 龚丽霞, 等. 超薄金膜发光层光子晶体三明治结构的光学特性及荧光调制[J]. 光学学报, 2012, 32(20): 1016001.

Chen Yuanhao, Liu Guiqiang, Gong Lixia, et al.. Optical properties and fluorescence modification of the sandwich structure composed of ultra-thin gold films light-emitting layers and photonic crystals[J]. Acta Optica Sinica, 2012, 32(10): 1016001.

[6] 董海霞, 董丽娟, 杨成全, 等. 含单层负折射率缺陷的光子晶体的光学特性[J]. 中国激光, 2011, 38(10): 1006002.

Dong Haixia, Dong Lijuan, Yang Chengquan, et al.. Optical properties of once dimensional photonic crystal containing a single defect layer with negative refractive index[J]. Chinese J Lasers, 2011, 38(10): 1006002.

[7] V N Konopsky, E V Alieva. A biosensor based on photonic crystal surface wave with an independent[J]. Biosensors and Bioelectronics, 2010, 25(5): 1212-1216.

[8] T Srivastava, R Das, R Jha. Highly accurate and sensitive surface plasmon resonance sensor based on channel photonic crystal waveguides[J]. Sensors and Actuators B: Chemical, 2011, 157(1): 246-252.

[9] W Su, G Zheng, X Li. A resonance wavelength easy tunable photonic crystal bionsensor using surface plasmon resonance effect[J]. Optik, 2013, 124(21): 5161-5163.

[10] P Rivolo, F Michelotti, F Frascella, et al.. Real time secondary antibody detection by means of silicon-based multilayers sustaining Bloch surface waves[J]. Sensors and Actuators B: Chemical, 2012, 161(1): 1046-1052.

[11] A L Johnson, A G Sega, A Sharief, et al.. Real-time 1D hyperspectral imaging of porous silicon-based photonic crystals with one-dimensional chemical composition gradients undergoing pore-filling-induced spectral shifts[J]. Sensors and Actuators A: Physical, 2013, 203: 154-159.

[12] A Namdar, R Talebzadeh, K J Ghaleh. Surface wave-induced enhancement of the Goos-Hnchen shift in single negative one-dimensional photonic crystal[J]. Optics & Laser Technology, 2013, 49: 183-187.

陈颖, 卢波, 范卉青. SiO₂-Al₂O₃-SiO₂光子晶体缺陷腔的折射率传感特性[J]. 中国激光, 2014, 41(6): 0605003. Chen Ying, Lu Bo, Fan Huiqing. Refractive Index Sensing Property of SiO₂-Al₂O₃-SiO₂ Photonic Crystal Defect Cavity[J]. Chinese Journal of Lasers, 2014, 41(6): 0605003.

SiO₂-Al₂O₃-SiO₂光子晶体缺陷腔的折射率传感特性

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