Construction of Optical Fourier Volumes using Photoaddressable Polymers and Epoxy-based Photopolymers
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초록
내용
Optical Fourier Surfaces (OFSs), which are surface gratings sinusoidally inscribed, have been produced through various methods and advanced fabrication techniques. However, their volumetric equivalents, Optical Fourier Volumes (OFVs), have not been developed due to the reactive nature of resists and limitations in thickness in lithographic processes. Photoaddressable polymers containing azobenzene and liquid crystalline elements offer a promising solution for creating both OFSs and OFVs. In this study, we created polymethyl methacrylate-b-poly(liquid crystalline-r-azobenzene) PMMA-b-P(LC-r-Azo) block copolymers using atom transfer radical polymerization and demonstrated the ability to inscribe holograms on the film, which provides remarkable efficiency and simplicity in fabricating OFVs. The method was also evaluated and compared with a photopolymerization approach using epoxy-based photo-reactive resins to assess the benefits of using azobenzene-liquid crystalline polymers.