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Nano Lett. 2017 Oct 11;17(10):6034-6039. doi: 10.1021/acs.nanolett.7b02350. Epub 2017 Sep 13.

Two-Dimensional Active Tuning of an Aluminum Plasmonic Array for Full-Spectrum Response.

Author information

1
Department of Electrical and Computer Engineering, ‡Department of Physics and Astronomy, §Department of Chemistry, and ∥Laboratory for Nanophotonics, Rice University , Houston, Texas 77005, United States.

Abstract

Color pixels composed of plasmonic nanostructures provide a highly promising approach for new display technologies, capable of vivid, robust coloration and incorporating the use of low-cost plasmonic materials, such as aluminum. Here we report a plasmonic device that can be tuned continuously across the entire visible spectrum, based on integrating a square array of aluminum nanostructures into an elastomeric substrate. By stretching the substrate in either of its two dimensions, the period and therefore the scattering color can be modified to the blue or the red of the at-rest structure, spanning the entire visible spectrum. The unique two-dimensional design of this structure enables active mechanical color tuning, under gentle elastic modulation with no more than 35% strain. We also demonstrate active image switching with this structure. This design strategy has the potential to open the door for next-generation flexible photonic devices for a wide variety of visible-light applications.

KEYWORDS:

Stretchable plasmonics; active image switching; aluminum plasmonics; dynamic color display; full color display; full-color tuning

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