Subwavelength grating-based nanoplasmonic modulation for surface plasmon resonance imaging with enhanced resolution

Dong Jun Kim, Donghyun Kim

Research output: Contribution to journalArticle

19 Citations (Scopus)


In this study, we have investigated nanoplasmonic modulation for surface plasmon resolution imaging. Subwavelength metal grating was used to localize plasmon excitation, thereby limiting the propagation of surface plasmon. An optimum grating structure for an enhanced lateral imaging resolution was designed based on the effective medium theory. A metal grating at 400 nm period was fabricated on a metallic thin film and a BK7 glass substrate. For metal, both gold and silver were considered. Effects of other geometrical parameters such as grating thickness and orientation were also explored. The resolution enhancement was found to be more effective with silver than gold. Studies on grating thickness and orientation suggest that stronger plasmon localization produce more efficient resolution enhancement.

Original languageEnglish
Pages (from-to)1252-1259
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Issue number6
Publication statusPublished - 2010 Jun 1


All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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