Abstract
A cold filter that simultaneously achieves the reflection of infrared light and transmission of visible light was fabricated using a 2D metal periodic grating structure. A conventional dielectric multilayer film was used, which had abrupt filtering characteristics; however, there were problems with the incident angle, temperature, and polarization. To solve these problems, a 2D metal periodic grating structure was applied [1]. This type of structure has the advantage that it does not depend on polarization. In this study, the 2D metal periodic grating structure, comprising an Au layer and electron beam resist layer, was fabricated by electron beam lithography. The optical characterization of this structure in the visible light region was then conducted using a spectrometer.
© 2016 Japan Society of Applied Physics, Optical Society of America
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