Semi-Classical Analysis and Design of Quantum dot Based Electrically Pumped plasmonic nanolaser

Abstract

Recently there is an increasing attention to electrically pumped room temperature sub-wavelength plasmon sources because of their various potential applications mainly in the integrated plasmonic field. In this paper, a GaAs/AlGaAs quantum dot based waveguide integrated plasmonic nanolaser is introduced and theoretically investigated. Using a semi-classical rate equation model, performance of our nanolaser is studied and its characteristics are presented in details. The proposed nanolaser has a tiny footprint of 0.25 um2, room temperature operating condition and CMOS friendly process while having remarkable output performance. The new structure generates 1uW output power with 3.5mA injection current ( the threshold pump current is calculated to be about 2.5uA ) in 850 nm and has wide modulation frequency of 10 THz in threshold pumping rate, large Purcell factor about 3460 and high output coupling ratio to the host plasmonic waveguide.