金属纳米线阵列表面等离子体电光调制器

J4 ›› 2018, Vol. 35 ›› Issue (4): 493-498.

金属纳米线阵列表面等离子体电光调制器

汪梅婷,王美玉,郭佳,王福成,童凯

1燕山大学里仁学院，河北秦皇岛 066004； 2燕山大学电气工程学院，河北秦皇岛 066004

收稿日期:2017-04-14 修回日期:2017-07-04 出版日期:2018-07-28 发布日期:2018-07-12
通讯作者: 汪梅婷(1976-)，河北人，女，硕士，讲师，主要从事光学信息处理方面的研究。 E-mail:tongkai@ysu.edu.cn
基金资助:
Supported by National Natural Science Foundation（国家自然科学基金，61172044）

Metal nanowire array surface plasmon electro-optic modulator

WANG Meiting , WANG Meiyu, GUO Jia, WANG Fucheng, TONG Kai

1 College of Liren, Yanshan University, Qinhuangdao 066004, China; 2 School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China

Received:2017-04-14 Revised:2017-07-04 Published:2018-07-28 Online:2018-07-12

摘要/Abstract

摘要：

基于表面等离子体共振(SPR)技术，设计了一种具有较高调制系数的金属纳米线阵列电光调制器结构。通过改变驱动电压使反射谱的反射率发生变化，实现电光调制。利用时域有限差分(FDTD)法对金属纳米线阵列层和缓冲介质层的参数进行优化配置，并研究了其结构参数对反射谱反射率的影响。结果表明：当金属纳米线直径为34 nm、缓冲介质层厚度为1600 nm时，电光调制器的模式耦合能力达到最强；随着驱动电压的逐渐增加，反射光谱的全吸收峰出现明显的右移；通过调节加载在电极上的驱动电压可实现电信号对光信号的电光调制。

关键词: 光电子学；电光调制器；时域有限差分法；表面等离子体；金属纳米线阵列

Abstract:

A metal nanowire array electro-optic modulator with high modulation coefficient is designed based on surface plasmon resonance (SPR) technology. The reflectivity of reflection spectrum is changed by changing the driving voltage, and electro-optic modulation is achieved. The finite difference time domain (FDTD) method is used to optimize the parameters of metal nanowire array and buffer medium layer, and the influence of structural parameters on reflectivity of reflection spectrum is investigated. Results show that when the metal nanowire diameter is 34 nm, buffer dielectric layer thickness is 1600 nm, the mode coupling ability of electro-optic modulator is the strongest. With the gradually increasing of driving voltage, the total absorption peak of reflectance spectrum appears obviously shift to the right. Electro-optical modulation of the optical signal by electrical signal can be achieved by adjusting the driving voltage loaded on the electrode.

Key words: optoelectronics; electro-optical modulator; finite-difference time-domain method; surface plasmon resonance; metal nanowires array

中图分类号:

O439

汪梅婷王美玉郭佳王福成童凯. 金属纳米线阵列表面等离子体电光调制器[J]. J4, 2018, 35(4): 493-498.

WANG Meiting , WANG Meiyu, GUO Jia, WANG Fucheng, TONG Kai. Metal nanowire array surface plasmon electro-optic modulator[J]. J4, 2018, 35(4): 493-498.

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