  In order to achieve electrically pumped plasmon nano lasers, several
structures, materials and methods, have been proposed recently. However, there
is still a long way to find out a reliable appropriate on-chip plasmon source
for commercial plasmonic integrated circuits. In this paper, a new waveguide
integrated nanocavity plasmon laser is proposed for 1550 nm free-space
wavelength. Due to its significant field confinement resulted by the metal
strip structure and strong interaction of plasmonic modes with the germanium
quantum wells and as a result a considerable Purcell factor about 291, this
structure has a remarkable output performance. Using semi-classical rate
equations in combination with finite difference time domain (FDTD) cavity mode
analysis, the output performance measures are estimated and confirmed with
respect to various physical models and simulation tools. Simulation results for
this tiny structure (0.073 um2 area) show a 2.8uW output power with 10uA
injection current and about 4.16mW output power with the threshold pump current
of 27mA while maintaining its performance in a wide modulation bandwidth of
178GHz.
