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Classical Theory of Optical Near Field

  • Itsuki Banno
Reference work entry

Abstract

The main purpose of this chapter is to present the quasi-static picture of an optical field in the vicinity of small-scale material. The quasi-static picture depends on the fact that the induced boundary charge density dominates the optical near field of a small-scale material via Coulomb’s law; therefore, such an optical near field is of a non-radiative or longitudinal nature. This simple physics leads to an intuitive understanding, even in complicated systems with magneto- and electro-optical effects. As prerequisites, the definitions of elementary concepts are given: “retardation effect,” “diffraction limit,” “near field,” and “far field.” Furthermore, two numerical methods are presented using the minimum degree of freedom of an electromagnetic field; one is described by the scalar potential adequate for a quasi-static system and the other by a dual vector potential for general optical systems. This chapter is restricted to linear optical effects and is a revised version of the article titled by “Classical Theory on Electromagnetic Near Field” in Progress in Nano-Electro-Optics II (Springer-Verlag Berlin Heidelberg, 2004).

Keywords

Scalar Potential Retardation Effect Bulk Effect Boundary Source Bulk Source 
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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Electrical Electronic EngineeringUniversity of YamanashiYamanashiJapan

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