材料科学
光学
等离子体子
光电子学
栅栏
表面等离子体激元
边带
彩色滤光片阵列
透射率
表面等离子体子
导模共振
光学滤波器
衍射
非凡的光传输
金属绝缘体金属
衍射光栅
彩色凝胶
电信
物理
无线电频率
纳米技术
图层(电子)
电压
薄膜晶体管
量子力学
电容器
计算机科学
作者
Chuhao Jiang,Shuhai Liang,Lei Wan,Kang Du,Wending Zhang,Zhaohui Li,Soo Jin Chua,Ting Mei
出处
期刊:Applied Optics
[The Optical Society]
日期:2020-05-08
卷期号:59 (14): 4432-4432
被引量:5
摘要
Plasmonic color filters are expected to be candidates for application to complementary metal–oxide–semiconductor (CMOS) image sensor arrays with reduced pixel size, owing to the subwavelength mode volume of plasmons. Designs of metallic gratings based on the guided-mode resonance effect suffer from the sideband transmission issue due to high-order diffraction. Here, we propose a plasmonic color filter structure based on a hetero-metal-insulator-metal grating. The guided mode, in resonance with the second-order diffraction, is highly attenuated by the forbidden band, such that the sideband transmission can be suppressed. As calculated by using the transfer matrix method and the finite-difference time-domain method, the Al-ZnO-Ag waveguide-based structure presents a color filter characteristic with the peak transmittance greater than 70% and the peak wavelength tunable in the visible light band. It may find application in displays, image sensors, and biomedical imaging technologies.
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