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Plasmonics

pp 1–7 | Cite as

Compact Plasmonic Lens Based on Nanoslits in the Tree Age Chart Arrangement

  • Mehdi Ashari-BavilEmail author
  • Mingli Dong
  • Chuanbo LiEmail author
  • Shuai Feng
  • Lianqing Zhu
Article
  • 25 Downloads

Abstract

A novel plasmonic planar slit lens, consisting of five slits in tree age chart arrangement with gradually decreasing widths and interspace distances, is proposed. The slits width and interspaces are related with each other by introducing a scaling constant k that was previously introduced in nanoparticle chains. At specific k values, the light propagates extraordinarily through the slits and causes focusing features beneath the metallic layer. The underlying physics behind the focusing is because of additional phase imposed on traveling light through the slits and their constructive interference. Numerical simulation is used to demonstrate the focusing behavior. Results show that the slit width should not be larger than half wavelength, and the scaling constant should be between 0.3 and 0.4. Salient features of the proposed structure are ultra-compactness, large transmission, and ease of fabrication.

Keywords

Surface plasmons Plasmonic lens Planar slit configuration 

Notes

Funding Information

This work was supported by the Program for Changjiang Scholars and Innovative Research team in University (Grant IRT -16R07).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Joint International Research Laboratory of Advanced Photonics and ElectronicsBeijing Information Science and Technology UniversityBeijingChina
  2. 2.Beijing Key Laboratory for Optoelectronic Measurement TechnologyBeijing Information Science and Technology UniversityBeijingChina
  3. 3.School of ScienceMinzu University of ChinaBeijingChina

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