Photonics Research, 2021, 9 (1): 01000013, Published Online: Dec. 15, 2020   

Metasurface-based subtractive color filter fabricated on a 12-inch glass wafer using a CMOS platform Download: 864次Cover paper

Author Affiliations
1 Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), Singapore 138634, Singapore
2 Current Address: School of Microelectronics Science and Technology, Sun Yat-sen University, Zhuhai 519082, China
Abstract
Optical color filters are widely applied in many areas including display, imaging, sensing, holography, energy harvest, and measurement. Traditional dye-based color filters have drawbacks such as environmental hazards and instability under high temperature and ultraviolet radiation. With advances in nanotechnology, structural color filters, which are based on the interaction of light with designed nanostructures, are able to overcome the drawbacks. Also, it is possible to fabricate structural color filters using standard complementary metal-oxide-semiconductor (CMOS) fabrication facilities with low cost and high volume. In this work, metasurface-based subtractive color filters (SCFs) are demonstrated on 12-inch (300-mm) glass wafers using a CMOS-compatible fabrication process. In order to make the transmissive-type SCF on a transparent glass wafer, an in-house developed layer transfer process is used to solve the glass wafer handling issue in fabrication tools. Three different heights of embedded silicon nanopillars (110, 170, and 230 nm) are found to support magnetic dipole resonances. With pillar height and pitch variation, SCFs with different displayed colors are achieved. Based on the resonance wavelength, the displayed color of the metasurface is verified within the red-yellow-blue color wheel. The simulation and measurement results are compared and discussed. The work provides an alternative design for high efficiency color filters on a CMOS-compatible platform, and paves the way towards mass-producible large-area metasurfaces.

Zhengji Xu, Nanxi Li, Yuan Dong, Yuan Hsing Fu, Ting Hu, Qize Zhong, Yanyan Zhou, Dongdong Li, Shiyang Zhu, Navab Singh. Metasurface-based subtractive color filter fabricated on a 12-inch glass wafer using a CMOS platform[J]. Photonics Research, 2021, 9(1): 01000013.

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