Focusing behavior of 2-dimensional plasmonic conical zone plate

Focusing behavior of 2-dimensional plasmonic conical zone plate

Bibliographic Details
Parent link:Optical and Quantum Electronics
Vol. 49, iss. 8.— 2017.— [271, 9 p.]
Main Author: Mote R. G. Rakesh
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Институт неразрушающего контроля (ИНК) Кафедра точного приборостроения (ТПС)
Other Authors: Minin O. V. Oleg Vladilenovich, Minin I. V. Igor Vladilenovich
Summary:Title screen
A conical configuration plasmonic zone plate based on Fresnel zones made up of Au thin film slits is proposed for focusing in the free space with visible illumination. The surface plasmons enable propagation of radiating modes to distances equal to several wavelengths of the illumination field. Through numerical simulations, the conical structure found to yield focal spot beating the diffraction barrier encountered by conventional focusing elements. The focal spot size measured as full-width at half-maximum (FWHM) is observed to be as small as 0.31 times the illumination wavelength at the focal distance of 8 wavelength. Moreover, the simple design rules make it possible to predict and control the focal distances accurately.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2017
Subjects:
электронный ресурс
труды учёных ТПУ
дифракционные элементы
поляритонные спектры
Online Access:https://doi.org/10.1007/s11082-017-1108-2
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656492

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