Duty ratio-dependent fluorescence enhancement through surface plasmon resonance in Ag-coated gratings

Xiaoqiang Cui, Keiko Tawa, Hironobu Hori, Junji Nishii

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

One-dimensional gratings with different duty ratios were designed and implemented for enhanced fluorescence detection and imaging. Verified by finite difference time domain simulations, our results showed that the enhancement strongly depended on the duty ratio of the land width to pitch of the grating structure. The maximum enhancement factor was achieved when the duty ratio was equal to 0.50 in our trapezoidal gratings with pitch=400 nm and depth=20 nm. Such a facile grating mold will exert a considerable influence on microarray biosensors and fluorescence microscopy.

Original languageEnglish
Article number133117
JournalApplied Physics Letters
Volume95
Issue number13
DOIs
Publication statusPublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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