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Decorative near-infrared transmission filters featuring high-efficiency and angular-insensitivity employing 1D photonic crystals |
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| Authors: | Ji Chengang Yang Chenying Shen Weidong Lee Kyu-Tae Zhang Yueguang Liu Xu Guo L Jay |
| Affiliation: | 1.Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor, Michigan, 48109, USA ;2.State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, 310027, China ;3.Department of Physics, Inha University, Incheon, 22212, Republic of Korea ; |
| Abstract: | We present a new scheme for visibly-opaque but near-infrared-transmitting filters involving 7 layers based on one-dimensional ternary photonic crystals, with capabilities in reaching nearly 100% transmission efficiency in the near-infrared region. Different decorative reflection colors can be created by adding additional three layers while maintaining the near-infrared transmission performance. In addition, our proposed structural colors show great angular insensitivity up to ±60° for both transverse electric and transverse magnetic polarizations, which are highly desired in various fields. The facile strategy described here involves a simple deposition method for the fabrication, thereby having great potential in diverse applications such as image sensors, anti-counterfeit tag, and optical measurement systems.  |
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