Extracting Light Energy from the Minor Surface Arc of an Electrically Pumped Elliptical Microcavity Laser

In this paper, the efficiency of extracting light energy from the minor surface arc of the elliptical microcavity laser is investigated. The dynamic thermal equilibrium quantum medium FDTD (DTEQM-FDTD) model is used to simulate the field distribution and amplitude in the microcavity laser under electrical pumping. Light energy is extracted from the minor surface arc of the elliptical microcavity to a perpendicular waveguide. It is deduced from the field distribution that extraction efficiency of TM polarization is higher due to wider transverse field profile. Optimum light energy is extracted when the waveguide is 125 nm away from the edge of the elliptical minor arc. Higher extraction efficiency is also obtained when the waveguide index is lower than the microcavity index. It is believed that this method of extracting light energy allows for smaller device size with higher power output for building photonic integrated circuit.