We demonstrate the applications of shape memory polymers for deformable, programmable, and shape-memorizing micro-optical devices. A semi-crystalline shape memory elastomer, crosslinked poly(ethylene-co-vinyl acetate), is used to prepare different micro-optics such as microlens arrays, microprism arrays, gratings, and holograms. The precise replication of various surface features at the micro- and nanoscale and the formation of crosslinked shape memory polymer networks can be achieved in a single step via compression molding. Further deformation via hot pressing or stretching of the as-fabricated samples allows manipulation of the microscopic surface features, thus the programming of the corresponding optical properties. Due to the unique shape memory effect, the original surface structures and the optical properties can be recovered and the devices be reprogrammed. Furthermore, transparent ITO microheater arrays can be integrated onto the deformed micro-optical devices to selectively trigger the recovery of surface features in a user-definable manner.

Deformable, programmable, and shape-memorizing micro-optics

245th National Meeting (2013)

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