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

H. K. Seong; J. Yoo

doi:10.1063/1.4950857

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

H. K. Seong, J. Yoo

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	201904
Journal	Applied Physics Letters
Volume	108
Issue number	20
DOIs	https://doi.org/10.1063/1.4950857
Publication status	Published - 2016 May 16

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (NRF-2011-0017512).

Publisher Copyright:
© 2016 Author(s).

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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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.",

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N2 - 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.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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