Surface Plasmon Polaritons on Silver Gratings for Optimal SERS Response

Yevgeniya Kalachyova, David Mares, Oleksiy Lyutakov, Martin Kostejn, Ladislav Lapcak, Vaclav Švorčík

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

One of the most important obstacles for the application of surface enhanced Raman spectroscopy (SERS) is the poor reproducibility of SERS active substrates: SERS intensity can be varied from one substrate to another and moreover along the one substrate surface. Reproducible SERS substrate can be prepared through introduction of highly ordered metal array, where light focusing is achieved through excitation of surface plasmon-polaritons (SPPs). In this work, excimer laser patterning of poly(methyl methacrylate) followed by silver evaporation is proposed as an effective way for the creation of reproducible and effective surface plasmon-polaritons (SPP)-based SERS substrate. Detailed theoretical and experimental studies were performed to optimize structure parameter for effective SPP excitation. It was found that the narrow range of grating periodicity and metal thickness exist, where SPPs can be most efficiently excited. Despite the fact that SERS response was almost always achieved, the enhancement factor was found to vary more with the effectivity of SPP excitation. When the real structure parameters were set to optimal for SPP excitation, a SERS enhancement factor was achieved up to four times.

Original languageEnglish
Pages (from-to)9506-9512
Number of pages7
JournalJournal of Physical Chemistry C
Volume119
Issue number17
DOIs
Publication statusPublished - 30 Apr 2015
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Surface Plasmon Polaritons on Silver Gratings for Optimal SERS Response'. Together they form a unique fingerprint.

  • Cite this