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Surface Optics

  • David D. Nolte
Chapter
Part of the Bioanalysis book series (BIOANALYSIS, volume 1)

Abstract

Many optical biosensors detect molecules that either are attached to a surface, or are in close proximity to one. Therefore, understanding the optical properties of surfaces, and how these properties affect molecular interferometry, is a central topic of this book. Surfaces are planes of dielectric discontinuity that split the amplitude of waves into transmitted and reflected partial waves (Fig. 4.1). Surfaces impose electromagnetic boundary conditions that produce constructive or destructive interference of the incident and reflected waves. On the wrong type of surface (unity reflection with a π phase shift, as for a metal surface), a thin protein film can be entirely invisible to an incident plane wave (but not a surface wave), because the electric field strength at the molecular layer is canceled by destructive interference between the incident and reflected waves. In this situation, a light wave can pass right through the layer without ever polarizing it, and hence never sensing any change in the optical path length. This is perhaps the oldest and simplest form of optical cloaking [1].

Keywords

Reflection Coefficient Partial Wave Optical Path Length Scattered Field Phase Quadrature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Selected Bibliography

Selected Bibliography

  1. Heavens, O.S.: Optical Properties of Thin Solid Films. Dover, New York (1991) (An old classic on thin films)Google Scholar
  2. Maier, S.A.: Plasmonics: Fundamentals and Applications. Springer, New York (2007) (A good modern review of plasmonics)Google Scholar

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • David D. Nolte
    • 1
  1. 1.Department of PhysicsPurdue UniversityWest LafayetteUSA

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