Nanosphere-in-a-nanoegg: Damping the High-order Modes Induced by Symmetry Breaking

Overview

Journal Nanoscale Res Lett

Publisher Springer

Specialty Biotechnology

Date 2015 Apr 9

PMID 25852315

Citations 4

Authors

Jun Qian

Yi-Ding Sun

Yu-Dong Li

Jing-Jun Xu

Qian Sun

Affiliations

Soon will be listed here.

Abstract

We study the optical properties of the nanosphere-in-a-nanoegg structure (NSNE) by the three-dimensional finite difference time domain method. We demonstrate the suppression of the high-order plasmon modes in NSNE, which is induced by the plasmon interaction between the inner nanosphere and the outer nanoegg shell. A two-layer plasmon hybridization model is presented to explain this mechanism. The results we showed for plasmon mode suppression would be important to the design of the metal plasmonic devices. In addition, due to high tunable plasmon resonances in the near-infrared region (700 to 1,300 nm) with sub-100-nm size, NSNE can serve as a good substitute for the Au-silica-Au multilayer nanoshells in biological applications. Furthermore, compared with the Au-silica-Au nanoshells, NSNE has the advantage that the strong field enhancement can be achieved at the outer surface of the Au shell.

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