Fabrication of free-standing subwavelength metal-insulator-metal gratings using high-aspect-ratio nanoimprint techniques

被引:3
作者
Honma, Hiroaki [1 ,2 ]
Mitsudome, Masato [1 ]
Itoh, Shintaro [3 ]
Ishida, Makoto [1 ,4 ]
Sawada, Kazuaki [1 ,4 ]
Takahashi, Kazuhiro [1 ]
机构
[1] Toyohashi Univ Technol, Dept Elect & Elect Informat Engn, Toyohashi, Aichi 4418580, Japan
[2] Japan Soc Promot Sci, Chiyoda Ku, Tokyo 1020083, Japan
[3] Nagoya Univ, Dept Micronano Syst Engn, Nagoya, Aichi 4648603, Japan
[4] Toyohashi Univ Technol, Elect Inspired Interdisciplinary Res Inst EIIRIS, Toyohashi, Aichi 4418580, Japan
关键词
PLASMONIC COLOR FILTERS; IMAGE SENSOR; LITHOGRAPHY; LAYER;
D O I
10.7567/JJAP.55.06GP20
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this paper, we report on the construction of a free-standing metal-insulator-metal (MIM) subwavelength grating by nanoimprint and lift-off techniques, which can be used as a plasmonic color filter for imaging a multicolor spectrum. The free-standing subwavelength grating was designed to be composed of Al (50 nm)-SiO2 (150 nm)-Al (50 nm) layers, and the thickness of the SiO2 layer determined the wavelength selectivity for the color filter. The residual-free nanoimprint with an aspect ratio of 6 : 1 was applied in the lift-off process to the formation of MIM gratings. We successfully developed subwavelength MIM gratings with heights of more than 200 nm. We also demonstrated the fabrication of a free-standing MIM grating without lateral stiction, which was expected to improve the wavelength selectivity of a free-standing plasmonic color filter. (C) 2016 The Japan Society of Applied Physics
引用
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页数:5
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