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Elaine Lee, Milin Zhang, Yigil Cho, Yue Cui, Jan Van der Spiegel, Nader Engheta and Shu Yang Tilted Pillars on Wrinkled Elastomers as a Reversibly Tunable Optical Window Advanced Materials 26

Version of Record online: 7 APR 2014 | DOI: 10.1002/adma.201400711

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We demonstrate the design and fabrication of tilted micropillar arrays on wrinkled elastomeric poly(dimethylsiloxane) as a reversibly switchable optical window. Upon re-stretching the as-prepared (opaque) film to the original pre-strain, the grating color is restored and ∼30% transmittance is recovered. Further stretching beyond the pre-strain makes the film more transparent. This process is fully reversible and repeatable for many cycles.

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