Channel Plasmon Nanowire Lasers with V-Groove Cavities

Abstract

A hybrid channel plasmon nanowire laser based on GaAs/AlGaAs core-shell semiconductor nanowire and silver V-groove is proposed. The laser structure has potential capability of integrating with plasmonic waveguides, using channel plasmon-polariton modes in V-groove plasmonic waveguides. Guiding and lasing properties are numerically calculated using finite elements method. From the theoretical results, the laser could support guiding mode with a smallest diameter of 40 nm. Lasing emission could happen at a relatively low threshold around 2000 cm− 1 when the diameter is larger than 140 nm. A quite large Purcell factor of 180 could be achieved to enhance the spontaneous emission rate.

A Low-Threshold Miniaturized Plasmonic Nanowire Laser with High-Reflectivity Metal Mirrors

“…One limiting factor is the high absorptive loss of the metal. Some effort has been made to reduce the absorptive loss of the metal, such as using high-quality metal film [ 32 ], introducing an air gap between the NW and substrate [ 33 ], and adopting low-loss higher order SPP mode [ 34 ]. The end facet reflectivity also plays an important role in the NW laser performance and dimension [ 35 ].…”

Plasmon-Induced Transparency in an Asymmetric Bowtie Structure

“…With the excited signal light incident in the direction parallel to the chip surface, coupled micro-resonators are remarkable to meet the requirement of on-chip integration applications of EIT-like transmission. To further reduce the footprint of EIT devices, plasmon-induced transparency (PIT) has been proposed as an analog to the classical EIT with strong optical confinement beyond the diffraction limit for electromagnetic waves [17–19]. Surface plasmons are optically induced oscillations of the free electrons at the interface of metal/dielectric exhibiting strong optical confinement and miniaturized photonic components [20, 21].…”