Extraordinary Optical Transmission through Wedge-shape metallic slits array embedded with rectangular cavities

doi:10.1117/12.2284655

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	Extraordinary Optical Transmission through Wedge-shape metallic slits array embedded with rectangular cavities
	Qi, Yunping 1; Zhang, Xuewei 1; Hu, Yue 1; Nan, Xianghong 1; Wang, Xiangxian 2
	2017
关键词	physical optics extraordinary optical transmission surface plasmon polaritons wedge-shape metallic slits array finite element method
卷号	10460
DOI	10.1117/12.2284655
英文摘要	The non-resonantly enhanced optical transmission phenomenon of sub-wavelength metallic slits on a thin film is significant for broadband light integrated devices. In order to improve the EOT characteristics of sub-wavelength metallic slits further more, in this paper, wedge-shape metallic slits array embedded with rectangular cavities structure is proposed and its transmission properties are investigated using the finite element method. The results show that wedgeshape metallic slits array can achieve higher transmission compared with straight slits array embedded with rectangular cavities and the light is strongly localized and enhanced at the slit exits. We describe the phenomenon with a transmission line model. The width of entrance of the slit influences the transmission property: the transmittance can be 94%, after optimizing the structure parameters, with the widths 150nm and 30nm at the entrance and exit of the slit, respectively. The thickness of metal film influences the transmission peak position and transmission rate: when the increase of the thickness of the metal film, the transmittance increases and the transmission peak is red-shift, however, the law of long wavelength range is opposite. In addition, the effects of structural period of wedge-shaped slits embedded with rectangular cavities structure on the transmission property are also studied. These results would be helpful for optical signal transmission and the design of near field optical conductor devices with higher transmission capability.
会议录	AOPC 2017: OPTOELECTRONICS AND MICRO/NANO-OPTICS
会议录出版者	SPIE-INT SOC OPTICAL ENGINEERING
会议录出版地	1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
语种	英语
资助项目	National Natural Science Foundation of China[61367005]
WOS研究方向	Engineering ; Science & Technology - Other Topics ; Optics
WOS记录号	WOS:000425344700040
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/36291]
专题	理学院
通讯作者	Qi, Yunping
作者单位	1.Northwest Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Qi, Yunping,Zhang, Xuewei,Hu, Yue,et al. Extraordinary Optical Transmission through Wedge-shape metallic slits array embedded with rectangular cavities[C]. 见:.