Electrically tuned photonic crystals are produced by applying fields across shear-assembled elastomeric polymer opal thin films. At increasing voltages, the polymer opal films stretch biaxially under Maxwell stress, deforming the nanostructure and producing marked color changes. This quadratic electro-optic tuning of the photonic bandgap is repeatable over many cycles, switches within 100 ms, and bridges the gap between electro-active materials and photonic crystals.
Electric-field-tuned color in photonic crystal elastomers
Qibin Zhao, Andrew Haines, David Snoswell, Christoph Keplinger, Rainer Kaltseis, Siegfried Bauer, Ingrid Graz, Richard Denk, Peter Spahn, Goetz Hellmann, Jeremy J. Baumberg; Electric-field-tuned color in photonic crystal elastomers. Appl. Phys. Lett. 5 March 2012; 100 (10): 101902. https://doi.org/10.1063/1.3691930
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