Simulation and experimental observations of axial position control of a photonic nanojet by a dielectric cube with a metal screen

Simulation and experimental observations of axial position control of a photonic nanojet by a dielectric cube with a metal screen

Bibliographic Details
Parent link:Optics Letters
Vol. 46, iss. 17.— 2021.— [P. 4292-4295]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение электронной инженерии
Other Authors: Liu Cheng-Yang, Chen Weiyu, Geynts Yu. E. Yury Elmarovich, Minin O. V. Oleg Vladilenovich, Minin I. V. Igor Vladilenovich
Summary:Title screen
In this Letter, we report on a numerical study, fabrication, and experimental observations of photonic nanojet (PNJ) shaping by control of a tangential electric field component. Here the PNJs are generated by a single mesoscale micro-cube that is fabricated from polydimethylsiloxane, deposited on a silicon substrate and placed on thick metal screen at illuminating wavelengths of 405, 532, and 671 nm. It is shown that the length, focal length, and width of the PNJ can be significantly reduced in the presence of the metal masks along the side faces of the micro-cube. Experimental measurements of the PNJ imaging are performed by a scanning optical microscope with laser sources. Our experimental results are in reasonable agreement with simulation predictions of the finite-difference time-domain method. Due to the appearance of the metal masks, the PNJ focal length decreases 1.5 times, the PNJ decay length decreases 1.7 times, and the PNJ resolution increases 1.2 times. Such PNJs possess great potential in complex manipulation, including integrated plasmonic circuits, biosensing, and optical tweezers.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2021
Subjects:
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1364/OL.431807
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665673

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