Surface plasmon optical antennae in the infrared region with high resonant efficiency and frequency selectivity

Hiroaki Misawa, Tomoya Oshikiri, Takumi Itoh, Masahiro Min, Quan Sun, Ueno Kosei

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Infrared light has received attention for sensor applications, including fingerprint spectroscopy, in the bioengineering and security fields. Surface plasmon physics enables the operation of a light harvesting optical antenna. Gold nanochains exhibit localized surface plasmon resonance (LSPR) in the infrared region with high frequency selectivity. However, a feasible design for optical antennae with a higher resonant efficiency and frequency selectivity as a function of structural design and periodicity is still unknown. In the present study, we investigated the relationship between the resonant efficiency and frequency selectivity as a function of the structural design of gold nanochains and explored structural periodicity for obtaining highly frequency-selective optical antennae. An optical antenna design with higher resonant efficiency is proposed on the basis of its efficient interaction with non-polarized light. (C) 2016 Optical Society of America
Original languageEnglish
Pages (from-to) 17728-17737
Number of pages10
JournalOptics Express
Volume24
Issue number16
DOIs
StatePublished - 8 Aug 2016

Keywords

  • SPECTRAL PROPERTIES; GOLD NANORODS; TERAHERTZ; NANOPARTICLES

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