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Manipulation of multi-dimensional plasmonic spectra for information storage

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Abstract

We demonstrate a concept of optical data storage through plasmonic resonances of metallic nano-structures. Metallic nano-structures exhibit strong variations in their reflectance and/or transmittance spectra due to surface plasmon polariton resonances. We study the variations of spectra through 50×50 arrays of repeated unit cells covering a total area of ~50×50 µm2. Each cell contains 10 different nano-features, such as an ellipse, a ring, a circle, a triangle, a square, etc. The size of each unit-cell is 500×500 nm2, and the periodicity is 1.0 µm. The variations of spectra are obvious enough to be distinguished and then retrieved.

© 2011 Optical Society of America

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