应用光学, 2012, 33 (2): 427, 网络出版: 2012-05-02  

电压调控多种金属膜波导特性研究

Properties of various metal cladding waveguides modulated by voltage
作者单位
1 四川大学 电子信息学院,四川 成都 610064
2 中国工程物理研究院 激光聚变研究中心,四川 绵阳 621900
3 西南技术物理研究所,四川 成都 610041
摘要
采用自由空间耦合的方法,激发双面金属包覆波导中的超高阶导模,通过在双面金属包覆介质波导的两个金属膜上加不同的电压,改变导波层铌酸锂的厚度和折射率,得到不同参数下的衰减全反射谱,从而验证超高阶导模的偏振不灵敏性及对导波层厚度和折射率十分灵敏的特殊性质,实验结果与理论相吻合。比较相同条件下反射率的变化,得到铝包覆波导的灵敏度要高于金包覆波导。所得结果对集成光电子器件的研制有一定的参考价值。
Abstract
In this article, the ultrahigh-order modes which exist in the symmetrical metal cladding optical waveguide are excited by using free-space coupling method. The refractive index and thickness of LiNbO3 slab are changed through adding different voltages between the two metal films which are in symmetrical metal-cladding optical waveguide. The attenuated total reflection (ATR) spectrum with different parameters is obtained. The experimental results show that the ultrahigh-order mode is polarization independence and very sensitive to the thickness and refractive index of the waveguide layer. The experimental results agree better with theoretical predictions. Under the same conditions, the sensitivity of the symmetrical Al-cladding optical waveguide is higher than the symmetrical Au-cladding optical waveguide. The results have certain reference value for the development of the integrated optoelectronic devices.

张一, 冯国英, 周国瑞, 隋展, 王建军, 马孜. 电压调控多种金属膜波导特性研究[J]. 应用光学, 2012, 33(2): 427. ZHANG Yi, FENG Guo-ying, ZHOU Guo-rui, SUI Zhan, WANG Jian-jun, MA Zi. Properties of various metal cladding waveguides modulated by voltage[J]. Journal of Applied Optics, 2012, 33(2): 427.

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