Surface profile dependence of the photon coupling efficiency and enhanced fluorescence in the grating-coupled surface plasmon resonance

Hironobu Hori, Keiko Tawa, Kenji Kintaka, Junji Nishii, Yoshiro Tatsu

Research output: Contribution to journalReview articlepeer-review

11 Citations (Scopus)

Abstract

The fluorescence excited by the enhanced electric field of grating-coupled surface plasmon resonance was detected on biochips. The enhancement of the electric field on a metallic grating surface was calculated using the finite difference time domain method for rectangular, trapezoidal, and sinusoidal models to clarify the grating-surface profile dependence of the enhanced fluorescence. The computational results showed that the enhancement in the trapezoidal model was stronger than that in the other models, and that the groove depth dependence of the enhancement in the trapezoidal model agreed well with the experimental data. The grating surface profile, including the groove depth, was found to be an important parameter of the grating structure for it to couple effectively with light.

Original languageEnglish
Article number114702
JournalJournal of Applied Physics
Volume107
Issue number11
DOIs
Publication statusPublished - Jun 1 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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