Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing.

Journal Article (Journal Article)

The presence of microhole arrays in thin Au films is suited for the excitation of localized and propagating surface plasmon (SP) modes. Conditions can be established to excite a resonance between the localized and propagating SP modes, which further enhanced the local electromagnetic (EM) field. The co-excitation of localized and propagating SP modes depends on the angle of incidence (θ(exc)) and refractive index of the solution interrogated. As a consequence of the enhanced EM field, enhanced sensitivity and an improved response for binding events by about a factor of 3 to 5 was observed with SPR sensors in the Kretschmann configuration for a set of experimental conditions (λ(SPR), θ(exc), and η). Thus, microhole arrays can improve sensing applications of SPR based on classical prism-based instrumentation and are suited for SP-coupled spectroscopic techniques.

Full Text

Duke Authors

Cited Authors

  • Live, LS; Dhawan, A; Gibson, KF; Poirier-Richard, H-P; Graham, D; Canva, M; Vo-Dinh, T; Masson, J-F

Published Date

  • December 2012

Published In

Volume / Issue

  • 404 / 10

Start / End Page

  • 2859 - 2868

PubMed ID

  • 22760504

Electronic International Standard Serial Number (EISSN)

  • 1618-2650

International Standard Serial Number (ISSN)

  • 1618-2642

Digital Object Identifier (DOI)

  • 10.1007/s00216-012-6195-0


  • eng