Tunable Colors from Metal Nanomirrors

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2018-SONG-68286
Plasmonic nanostructures have been used recently to scatter light of different colors depending on their geometry and composition. Plasmonic color filters are becoming popular because they have a high resolution, are environmentally friendly, and are mechanically/chemically robust. The rapid development in the area of data storage and security calls for extra tuning parameters to increase levels of information states.

Researchers at Purdue University have developed a dynamically tunable color filter based on a wavelength-dependent optical rotation effect. This technology can be designed for highly secure information encryption. Careful arrangement of differently oriented nanoantennas can be used to further increase the encoded information states and achieve highly secure encryption. This technology is better than existing solutions due to its capability of multiplexing highly distinguishable images with a single device, offering cheap and scalable manufacturing, high purity color generation, and high tolerance to viewing angles.

Advantages:
-Highly distinguishable images with single device
-Cheap, scalable device manufacturing
-Nontoxic and environmentally friendly
-High purity color generation

Potential Applications:
-Active color displays
-High-density optical data storage
-Security tagging
-Cryptography
May 17, 2018
Provisional-Patent
United States
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Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org