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Opt Express. 2009 Apr 13;17(8):6860-6.

Creating high density nanoantenna arrays via plasmon enhanced particle-cavity (PEP-C) architectures.

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  • 1Biomolecular Nanotechnology Center, Department of Bioengineering, University of California-Berkeley, Berkeley, CA 94720, USA.


We propose a new solution for high hot-spot density creation by coupling a particle and a cavity in a structure dubbed a plasmonic enhanced particle-cavity (PEP-C) antenna. In comparison to analogous particle-based dimer antenna structures, the PEP-C allows both a higher maximum field and an order-of-magnitude higher hot-spot density. In addition, the hot-spots of the PEP-C antenna can be precisely controlled, resulting in increased reliability. We elucidate the photonic characteristics of the PEP-C antenna and show tuning and optimization through choice of geometric parameters. These properties make the PEP-C antenna an excellent candidate for plasmonic-based biomolecular sensors.

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