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

Ludovic S. Live, Anuj Dhawan, Kirsty F. Gibson, Hugo-Pierre Poirier-Richard, Duncan Graham, Michael Canva, Tuan Vo-Dinh, Jean-Francois Masson

Research output: Contribution to journalArticle

26 Citations (Scopus)

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 (theta (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 (lambda (SPR), theta (exc), and eta). Thus, microhole arrays can improve sensing applications of SPR based on classical prism-based instrumentation and are suited for SP-coupled spectroscopic techniques.

LanguageEnglish
Pages2859-2868
Number of pages10
JournalAnalytical and Bioanalytical Chemistry
Volume404
Issue number10
DOIs
Publication statusPublished - Dec 2012

Fingerprint

Electromagnetic Fields
Plasmons
Refractometry
Electromagnetic fields
Incidence
Prisms
Refractive index
Thin films
Sensors

Keywords

  • surface plasmon
  • microhole arrays
  • biosensing
  • enhanced sensitivity
  • angle dependent amplification

Cite this

Live, Ludovic S. ; Dhawan, Anuj ; Gibson, Kirsty F. ; Poirier-Richard, Hugo-Pierre ; Graham, Duncan ; Canva, Michael ; Vo-Dinh, Tuan ; Masson, Jean-Francois. / Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing. In: Analytical and Bioanalytical Chemistry. 2012 ; Vol. 404, No. 10. pp. 2859-2868.
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Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing. / Live, Ludovic S.; Dhawan, Anuj; Gibson, Kirsty F.; Poirier-Richard, Hugo-Pierre; Graham, Duncan; Canva, Michael; Vo-Dinh, Tuan; Masson, Jean-Francois.

In: Analytical and Bioanalytical Chemistry, Vol. 404, No. 10, 12.2012, p. 2859-2868.

Research output: Contribution to journalArticle

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T1 - Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing

AU - Live, Ludovic S.

AU - Dhawan, Anuj

AU - Gibson, Kirsty F.

AU - Poirier-Richard, Hugo-Pierre

AU - Graham, Duncan

AU - Canva, Michael

AU - Vo-Dinh, Tuan

AU - Masson, Jean-Francois

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AB - 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 (theta (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 (lambda (SPR), theta (exc), and eta). Thus, microhole arrays can improve sensing applications of SPR based on classical prism-based instrumentation and are suited for SP-coupled spectroscopic techniques.

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