Designing diffraction optical elements for the focusing of plasmon modes

Безус Е.А., Досколович Л.Л., Казанский Н.Л., Сойфер В.А. Расчет дифракционных оптических элементов для фокусировки плазмонных мод // Оптический журнал. 2010. Т. 77. № 7. С. 69–71.

Bezus E.A., Doskolovich L.L., Kazanskiy N.L., Soifer V.A. Designing diffraction optical elements for the focusing of plasmon modes [in Russian] // Opticheskii Zhurnal. 2010. V. 77. № 7. P. 69–71.

E. A. Bezus, L. L. Doskolovich, N. L. Kazanskiĭ, and V. A. Soĭfer, "Designing diffraction optical elements for the focusing of plasmon modes," Journal of Optical Technology. 77(7), 459-460 (2010). https://doi.org/10.1364/JOT.77.000459

This letter discusses the design of diffraction structures for the conversion and focusing of the plasmon modes (PMs) of a metal/dielectric interface and thin metal films. The calculation is based on the phase modulation of the PMs that accompanies transmission through a dielectric structure located immediately on the surface where the PMs propagate. Based on electromagnetic modelling, it is shown that the PMs can be phase-modulated by varying the height or length of the structure, as well as by simultaneously varying both parameters. As an example, we consider a trifocal lens for the focusing of PMs.

The research was supported by the grants of RFBR Nos. 09-07-12147, 09-07-92421 and 10-07-00553, the grant of the President of RF No. НШ-7414.2010.9, and also by the Russian-American program BRHE.