Enhanced optical transmission through a star-shaped bull's eye at dual resonant-bands in UV and the visible spectral range

Tavakol Nazari, Reza Khazaeinezhad, Woohyun Jung, Boram Joo, Byung Joo Kong, Kyunghwan Oh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Dual resonant bands in UV and the visible range were simultaneously observed in the enhanced optical transmission (EOT) through star-shaped plasmonic structures. EOTs through four types of polygonal bull's eyes with a star aperture surrounded by the concentric star grooves were analyzed and compared for 3, 4, 5, and 6 corners, using finite difference time domain (FDTD) method. In contrast to plasmonic resonances in the visible range, the UV-band resonance intensity was found to scale with the number of corners, which is related with higher order multipole interactions. Spectral positions and relative intensities of the dual resonances were analyzed parametrically to find optimal conditions to maximize EOT in UV-visible dual bands.

Original languageEnglish
Pages (from-to)18589-18601
Number of pages13
JournalOptics Express
Volume23
Issue number14
DOIs
Publication statusPublished - 2015 Jul 13

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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