Decomposition of the Point-Dipole Field into Homogeneous and Evanescent Parts

Tutkimustuotos: Lehtiartikkeli

Tutkijat

Organisaatiot

  • Royal Institute of Technology

Kuvaus

In near-field optics the resolution and sensitivity of measurements depend on the abundance of evanescent waves in relation to propagating waves. The electromagnetic field propagator is related to the scalar spherical wave, for which the Weyl expansion is a half-space representation containing both evanescent and homogeneous plane waves. Making use of these results, we decompose the dyadic free-space Green function into its evanescent and homogeneous parts and show that some approaches put forward in the literature are inconsistent with this formulation. We express the results in a form that is suitable for numerical computation and illustrate the field decomposition for a point dipole in some typical cases.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut1200-1206
Sivumäärä7
JulkaisuPhysical Review E
Vuosikerta59
Numero1
TilaJulkaistu - 1 tammikuuta 1999
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Tutkimusalat

  • evanescent field, green function, point dipole

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