Journal
OPTICA
Volume 2, Issue 3, Pages 255-258Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.2.000255
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Funding
- Alexander von Humboldt Foundation
- National Science Foundation (NSF) [0939514]
- U.S. Department of Defense (DOD) [N00244-09-1-0013, N00244-09-1-0080]
- UC Multicampus Research Program and Initiatives (MRPI)
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The ability to actively control the perceived color of objects is highly desirable for a variety of applications, such as camouflage, sensing, and displays. We report a completely new flexible, high-contrast metastructure (HCM) whose color can be varied by stretching the membrane. This is accomplished by annihilating the 0th order diffraction while enhancing the -1st order, a new phenomenon made possible with a large index contrast. The color perception of the HCM can thus be changed by varying its period. The structure is fabricated using silicon metastructures embedded in a flexible membrane. We experimentally demonstrate brilliant colors and change the color from green to orange (39 nm wavelength change) with a stretch of 25 nm period change. The same effect can be used for steering a laser beam, with more than 36 resolvable beam spots being demonstrated. (C) 2015 Optical Society of America
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