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LIU LU1,* , XU ZHANG1, XUAN TONG1, NAIFEI REN1, XIAOFANG XU1, YU WU1, YONG DING1
Understanding the effect of dielectric environment around silver nanowires would be of great importance for their applications in surface plasmon (SP) mediated non-linear effects and plasmonic waveguide. In this paper, we investigate the dependence of several surface plasmon (SP) characteristics of silver nanowire, e.g. energy confinement, hot energy site, propagation length and coupling distance, on the surrounding dielectric environment. It is found that a homogeneous dielectric environment results in a uniform energy distribution around the surface of the nanowire, and a high dielectric environment contributes to stronger energy confinement and shorter propagation length. On the other hand, for an inhomogeneous dielectric environment, energy hot spots are observed closing to the surrounding material with largest refractive index. Furthermore, the energy hot spots around silver nanowires get more confined in an abrupt change of dielectric environment. Besides, we find that the dielectric environment also affects the SP coupling distance of the two nanowires. Hence, the present simulation results can provide valuable reference for the researches of SP assisted spectrum enhancement or plasmonic waveguide..
Surface plasmon, Nanowire, Dielectric environment, Electromagnetic field.
LIU LU, XU ZHANG, XUAN TONG, NAIFEI REN, XIAOFANG XU, YU WU, YONG DING, Investigating the dependence of several surface plasmon characteristics on surrounding dielectric environment, Optoelectronics and Advanced Materials - Rapid Communications, 9, 9-10, September-October 2015, pp.1180-1184 (2015).
Submitted at: Sept. 13, 2014
Accepted at: Sept. 9, 2015
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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