Topological design of the film-coupled nanoparticle for the field intensity enhancement over the broadband visible spectrum

H. K. Seong, J. Yoo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An extremely high localized surface plasmon resonance (LSPR) is generated at the small gap between a gold (Au) nanoparticle and an Au thin film. The conventional LSPR of the film-coupled nanoparticle gives a narrow bandwidth, and it causes low efficiency from the energy harvesting point of view. In this study, we obtained a primary shape of the nanoparticle that works for the field enhancement in the broadband visible spectrum by using topology optimization combined with the concept of the probability density function. We confirmed that the derived elliptical hole and the thin layer at the lower nanoparticle part lead to a broad visible spectrum from blue to red range.

Original languageEnglish
Article number201904
JournalApplied Physics Letters
Volume108
Issue number20
DOIs
Publication statusPublished - 2016 May 16

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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