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Optics and Spectroscopy, 2021 Volume 129, Issue 7, Pages 903–920 (Mi os102)

Physical optics

On the radiation of a surface source along the normal to the boundary of a half-space and a plane-layered structure

A. B. Petrin

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: On the basis of the rigorous theory of radiation from an elementary current source located at the boundary of a plane-layered structure, the radiation of an arbitrary distribution of the surface current is considered. A strict relationship is obtained between the normal-radiated fields generated by an arbitrary distribution of the external surface current in the half-spaces surrounding the plane-layered structure. It is shown that the ratio of the amplitudes of electric fields at the same distance from a source emitting in opposite directions, normal to a plane-layered structure, is determined by a simple algebraic expression that includes the electromagnetic parameters of the media and the thickness of the structure's films. Special cases are also considered: a surface radiation source at the boundary of one homogeneous film and a surface source at the boundary of two homogeneous half-spaces.

Keywords: nanoantennas, optical sensors.

Received: 09.03.2021
Revised: 09.03.2021
Accepted: 22.03.2021

DOI: 10.21883/OS.2021.07.51082.1986-21


 English version:
Optics and Spectroscopy, 2021, 129:9, 979–996

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© Steklov Math. Inst. of RAS, 2025