https://doi.org/10.1140/epjp/s13360-021-02275-1
Regular Article
Surface plasmon polaritons excitation at the interface of graphene and sodium media
1
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei, 210094, Nanjing, China
2
Department of Physics, Hazara University Mansehra KPK, Dhodial, Pakistan
3
Abdus Salam International Center for Theoretical Physics, Trieste, Italy
4
James Watt School of Engineering, University of Glasgow, G12 8QQ, Glasgow, UK
Received:
24
July
2021
Accepted:
1
December
2021
Published online:
1
March
2022
The surface plasmon polaritons (SPPs) are excited at the interface of sodium and graphene media due to the effective control of dielectric functions of the two media. The absorption and dispersion behaviors of SPPs waves are modified with changing the strength of control fields and their phases. The normal and anomalous SPPs dispersion are controlled for slow and fast SPPs propagation. The group index changes in the range 
with the strength of control frequencies. The maximum SPPs group velocity is measured to be 
and the maximum propagation length is measured to be 80
. Furthermore, the propagation length of SPPs can be controlled with strength of the control fields and their phases variation. These controlled SPPs have potential applications in optical tweezers, nano-photonics, plasmonster technology and sensing technology.
The first and second author have equal contribution.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
