P‐13.17: 3D Liquid Crystal Polymer Based Holography via Two‐Photon Polymerization Direct Laser Writing

Recently, with the advantage of high‐efficiency and easily integrated, diffractive optical elements (DOEs) have been widely used in laser processing, beam shaping and rising virtual reality applications. Based on multi‐step or continuous relief structures on optical surfaces, and the precision requirements for manufacturing techniques are extremely stringent. With the development of laser direct writing technology, not only has the flexibility been substantially augmented, but also the manufacturing precision of diffractive optical elements has been elevated to the sub‐micron level. In our work, two‐photon polymerization direct laser writing technology is utilized to manufacture liquid crystal polymer based micro‐nano diffractive optical phase plate, which enables arbitrary design freedom in three‐dimension. Moreover, combined with unique optical birefringence of liquid crystal and photo‐alignment technology, phase and polarization of incident beam is able to be manipulate flexibly to achieve more complicated functions in optical field manipulation.