Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing - Institut d'Optique Graduate School Access content directly
Journal Articles Analytical and Bioanalytical Chemistry Year : 2012

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

Abstract

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 (θexc) 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 (λSPR, θexc, 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.

Dates and versions

hal-00777961 , version 1 (18-01-2013)

Identifiers

Cite

Ludovic S. Live, Anuj Dhawan, Kirsty F. Gibson, Hugo-Pierre Poirier-Richard, Duncan Graham, et al.. Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing. Analytical and Bioanalytical Chemistry, 2012, 404 (10), pp.2859-2868. ⟨10.1007/s00216-012-6195-0⟩. ⟨hal-00777961⟩
77 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More