Tilted pillars on wrinkled elastomers as a reversibly tunable optical window.
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.
Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA.
Elaine
E
Lee
Milin
M
Zhang
Yigil
Y
Cho
Yue
Y
Cui
Jan
J
Van der Spiegel
Nader
N
Engheta
Shu
S
Yang
hierarchical structure; smart window; tilted micropillars; tunable transmission; wrinkling