Manipulating Propagation Constants of Silver Nanowire Plasmonic Waveguide Modes Using a Dielectric Multilayer Substrate

Abstract

Abstract:Experiments and numerical simulations demonstrate that when a silver nanowire is placed on a dielectric multilayer, but not the commonly used bare glass slide, the effective refractive index of the propagating surface plasmons along the silver nanowire can be controlled. Furthermore, by increasing the thickness of the top dielectric layer, longer wavelength light can also propagate along a very thin silver nanowire. In the experiment, the diameter of the silver nanowire could be as thin as 70 nm, with the incident wavelength as long as 640 nm. The principle of this control is analysed from the existence of a photonic band gap and the Bloch surface wave with this dielectric multilayer substrate.

Optical properties of nanowires based on a blend of poly (9,9-dioctylfluorene) [PFO] and poly(9,9-dioctyl fluorene-alt-benzothiadiazole) [F8BT]

“…is similar to that previously observed in fluorene-based organic nanowires [4,9,13,33] and inorganic nanowires [34][35][36], whereby the resulting PL emission propagates along nanowire long-axis and out-couples at the tip.…”

Design of Surface Plasmon Nanolaser Based on MoS2

“…The structure has been studied by researchers and achieved a lot of good results. In addition, the propose of the grapheme [15][16][17][18][19][20] and MoS 2 [21][22][23][24][25][26][27][28] make nanolasers acquire a better performance.…”

Low Threshold Plasmonic Nanolaser Based on Graphene

“…How to make the waveguide structure have a lower propagation loss and have a super light-field local limiting ability is an urgent problem to be solved in the field of nanophotonics. Hybrid plasmonic waveguide (HP-waveguide) structure combines the low-loss transmission characteristics of dielectric optical waveguides with the strong optical field limitation of SPs waveguides [20][21][22][23][24][25][26], which has caused a new upsurge in the research field. In addition, with the advent of new materials, such as perovskite, graphene, and MoS 2 , the structural properties have been further improved.…”