Tunable Colors from Metal Nanomirrors

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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.

-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
Apr 7, 2021
CON-Gov. Funding
United States

May 13, 2019
Utility Patent
United States

May 17, 2018
United States
Purdue Office of Technology Commercialization
The Convergence Center
101 Foundry Drive, Suite 2500
West Lafayette, IN 47906

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