Plasmon Wave Propagation Property of Metal Wedge Plasmonic Waveguides Covered by a Protective Oxide Layer

Vu Thi Ngoc Thuy, Chu Manh Hoang
Author affiliations

Authors

  • Vu Thi Ngoc Thuy \(^1\) International Training Institute for Materials Science, Hanoi University of Sciences and Technology, No.1, Dai Co Viet, Hai Ba Trung, Hanoi, Vietnam;
    \(^2\) Faculty of Technical Education, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Viet Nam
  • Chu Manh Hoang Hanoi University of Science and Technology https://orcid.org/0000-0001-5808-8736

DOI:

https://doi.org/10.15625/0868-3166/15924

Keywords:

surface plasmon polariton, wedge plasmonic waveguide, protective oxide layer covered metal layer

Abstract

Guiding plasmon waves is based on dielectric/metal interfaces. The wedge-shaped interface shows an excellent capacity in the tight lightwave confinement at deep-subwavelength propagation mode size. Several types of metals have also been investigated for guiding plasmon waves. Among them, the Ag metal shows a plasmon wave guiding ability superior to other metals, however, it is sensitive to the operating medium and is easily oxidized. To overcome these drawbacks, the Ag wedge covered by a protective thin oxide layer is proposed. Numerically investigated results show that the propagation length of the Ag wedge covered by a protective thin silicon dioxide layer can be enhanced by a factor of 7.5 while its figure of merit is at least 1.7 times larger than that of the Au wedge waveguide. The advantage of the proposed interface is potential for developing plasmonic waveguide components.

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Published

27-03-2022

How to Cite

[1]
V. T. N. Thuy and C. M. Hoang, “Plasmon Wave Propagation Property of Metal Wedge Plasmonic Waveguides Covered by a Protective Oxide Layer”, Comm. Phys., vol. 32, no. 2, p. 179, Mar. 2022.

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Papers
Received 09-03-2021
Accepted 02-10-2021
Published 27-03-2022