超构表面是由亚波长结构单元组成，它可以利用微纳制造工艺在平面上制造出来。通过改变超构单元的形貌以及排列方式可以实现对光的精确控制，从而使超构表面实现多种光学器件的功能。超构表面平面光学器件具有超薄、超轻、可芯片级集成、易于大规模量产等优点，近些年来成为了微纳光子学里最热门的研究领域之一。基于紫外光刻工艺的晶圆级加工技术是未来实现超构表面光学器件大规模量产最可行的路线之一。本文综述了近些年来基于紫外光刻技术的晶圆级超构表面光学所取得的进展。这些研究工作在不同尺寸和材料的晶圆上实现了超透镜、偏振带通滤波器、半波片、完美吸收体、光束偏转器等光学器件。

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.