Mathematical modelling of the dynamics of a spaser with broken inversion symmetry in a low-frequency monochromatic field

Radiation spectrum of an elementary spaser (dipole nanolaser), being below threshold and interacting with external master monochromatic low-frequency field, was studied within the frame of the model approach. Spaser mathematical model is composed of a single plasmonic mode of a metallic nanoparticle interacting with an asymmetric two-level semiconductor quantum dot with broken spatial inversion symmetry, which's population inversion is supported by some sort of incoherent pumping. The model also includes a dissipative environment, with which the plasmonic nanoparticle and quantum dot are interacting too. It was shown that spaser radiation spectrum can be effectively alternated by controlling the amplitude and frequency of the low-frequency monochromatic driving field.