Broadband energy conversion between off-plane Gaussian lightwave and in-plane surface plasmon waves

Sheng Hsiung Chang, Chao Yi Tai

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We report on highly efficient energy conversion between off-plane Gaussian beam and in-plane surface plasmon waves (SPWs). The finite-difference time-domain method was used to analyze the conversion efficiency. In contrast to the single plasmonic rib structure, coupled ribs provide broadband and highly efficient SPW-conversion due to enlarged coupling zone. The simulation shows that Gaussian beam-to-SPWs conversion efficiency can be higher than 50% for the wavelength range from 750 to 950 nm. Compared to in-plane excitation, the present structure is superior in terms of the critical dimension of fabrication, showing promise as an efficient SPW generator in plasmonic nano-circuritry.

Original languageEnglish
Article number6025256
Pages (from-to)1727-1729
Number of pages3
JournalIEEE Photonics Technology Letters
Volume23
Issue number22
DOIs
StatePublished - 2011

Keywords

  • Nanophotonics
  • numerical simulation
  • surface waves

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