文档介绍：APPLIED PHYSICS LETTERS 89, 143518 ͑2006͒
Photon crystal waveguide-based surface plasmon resonance biosensor
͒
Maksim Skorobogatiya and Andrei V. Kabashin
Department of Engineering Physics, Ecole Polytechnique de Montreal, Case Postale 6079,
. Centre-ville, Montreal, Quebec H3C 3A7, Canada
͑Received 20 June 2006; accepted 26 August 2006; published online 6 October 2006͒
The concept of a photonic crystal waveguide-based surface plasmon resonance sensor is proposed,
in which plasmons on a surface of a thin metal film are excited by a Gaussian-like leaky mode of
an effectively single mode photonic crystal waveguide. The authors demonstrate that effective
refractive index of a waveguide core mode can be designed to be considerably smaller than that of
a core material, enabling efficient phase matching with plasmons at any wavelength of choice, while
retaining highly sensitive response to changes in the refractive index of an analyte layer. This is
attractive for the development of portable surface plasmon resonance biochemical sensors. © 2006
American Institute of Physics. ͓DOI:
Surface plasmon resonance ͑SPR͒ is a prominent optical are not easy to find and process͒ and results in high operation
phenomenon, which involves the resonant excitation of plas- frequencies ͑Ͻ650 nm͒, at which effective refractive index
mon or ic waves couple