In this thought-provoking episode, Dr. Ghimire joins us to discuss his research on topological nanospasers, an emerging field of study with vast potential for applications in diverse areas including infrared spectroscopy, sensing, probing, and biomedical treatment.

A topological nanospaser, as Dr. Ghimire explains, is a system consisting of a silver nanospheroid and a MoS2 monolayer flake with a circular shape. The metal nanospheroid functions as a plasmonic nanoresonator, supporting two rotating modes, which are coupled to the corresponding valleys of MoS2. When external circularly polarized light is applied, it selectively pumps only one of the valleys of MoS2, and this interaction underpins the generation of the spaser dynamics.

Dr. Ghimire elaborates on how the generated spaser dynamics are strongly influenced by the size (radius) ...