This article is cited in 2 papers

Plasmonics

Focusing of the surface plasmon wave on the nanoapex of a scanning metal microtip near a plane-layered structure

A. B. Petrin

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Moscow, Russia

Abstract: A generalized method of mirror reflections of electrostatics for a point charge located near a flat-layered structure is formulated and proved. The method is generalized to the case of an arbitrary system of charges. It is shown in detail how to apply the obtained method to finding the focal distribution of the electric field in the vicinity of the nanoapex of a metal micropoint located near the flat-layered structure, which is obtained when a surface plasmon TM wave converges to the nanoapex. The penetration of the field into the area of the surface layer of the flat-layered structure (photoresist) with a size of the order of the tip rounding radius is demonstrated.

Keywords: nanofocusing, surface plasmons, optical sensors.

Received: 30.04.2022
Revised: 08.06.2022
Accepted: 20.06.2022

DOI: 10.21883/OS.2022.09.53308.3636-22

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