Resonance characteristics of localized plasmonic structures with periodic ZnO nano-patterns

Doo Gun Kim, Seon Hoon Kim, Hyun Chul Ki, Tae Un Kim, Jae Cheol Shin, Young Wan Choi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Localized plasmonic structures with the periodic ZnO nano-patterns are demonstrated to increase the sensing characteristics of plasmonic sensor. The ZnO nano-patterns with 30 and 50 nm thicknesses are formed on the Au thin film of 50 nm, which have the periodic nano-patterns of 300 nm. Localized plasmonic structures are optimized using the three-dimensional finite-difference time-domain method as a function of incident angle for the width and thickness of the ZnO nano-structures. Localized plasmonic structures with the periodic ZnO nano-holes are fabricated using the double exposure technique by laser interference lithography. The measured resonance angles of 47.5° and 54° are obtained in the localized plasmonic structures with the periodic ZnO nano-patterns of 30 and 50 nm thicknesses, respectively.

Original languageEnglish
Article number347
JournalOptical and Quantum Electronics
Volume50
Issue number9
DOIs
StatePublished - 1 Sep 2018

Keywords

  • Biosensor
  • FDTD
  • Nano-hole
  • Surface plasmon resonance
  • ZnO

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