11 January 2018 Designed microstructure based on color filter and metallic nanoslit for multiband spectral compatible control
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Abstract
Controlling the spectral characteristics by regulating the geometry of microstructure has become an effective method to meet the requirements of various applications. To mediate the spectral characteristics, metallic subwavelength slits with different structures and color filters consisting of diverse materials were discussed, and then a designed microstructure composed of color filter and metallic slits, which were surrounded by grooves, was put forward for a compatible effect of controlling the spectral characteristics. Afterward, the spectral characteristics of the proposed structure were simulated by finite-difference time-domain method in the wavelength range of 300 to 10,000 nm. Additionally, the effects of geometric parameters on the spectral characteristics were studied. The results show that the presented microstructure can reflect a monochromatic color at the wavelength of 600 nm and its reflectance is 40 % . The average absorptance near the wavelength of 1060 nm is more than 95%, and the average reflectance in the infrared band exceeds 80%. In conclusion, the compatible spectrum control in three bands (i.e., visible, near-infrared, and mid-infrared) was realized.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhigang Zhan, Yuge Han, "Designed microstructure based on color filter and metallic nanoslit for multiband spectral compatible control," Journal of Nanophotonics 12(1), 016002 (11 January 2018). https://doi.org/10.1117/1.JNP.12.016002 . Submission: Received: 18 September 2017; Accepted: 18 December 2017
Received: 18 September 2017; Accepted: 18 December 2017; Published: 11 January 2018
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