Hybrid Nanowire–Rectangular Plasmonic Waveguide for Subwavelength Confinement at 1550 Nm

Abstract

This paper presents a hybrid waveguide based on metal surface plasmon polaritons (SPPs) at 1550 nm comprising two silver (Ag) nanowires and a rectangular silicon (Si) waveguide. Due to the strong coupling effect observed in both the metal SPP mode and Si waveguide mode, excellent waveguide characteristics, such as a small effective modal area and long transmission length, could be achieved. The research results revealed that the proposed hybrid waveguide could achieve an ultra-long transmission distance of 270 µm and normalized effective mode area of 0.01. Furthermore, the cross-sectional size of the waveguide was 500 nm × 500 nm, which helped in achieving a subwavelength size. In addition, the hybrid waveguide was resistant to manufacturing errors. These excellent performances indicate that the proposed waveguide has great application potential in optoelectronic integrated circuits.

Dual Coupled Long-Range Hybrid Surface Plasmon Polariton Waveguide for Sub-Wavelength Confinement

“…With the rapid development of optoelectronic integrated systems, the performance of optical devices is required to be higher [1,2]. A smaller device size is needed to improve circuit integration [3][4][5].…”

Editorial for the Special Issue on Advances in Optoelectronic Devices

“…In addition, the performance of the waveguides could be improved by designing new structures. Surface plasmon polaritons (SPPs) were introduced into the waveguide design by Wang et al [ 26 ]. The strong coupling effect could be observed in silicon waveguide mode and metal SPP mode, and excellent waveguide characteristics could be achieved.…”