polaritonlasing

Polariton lasing is a phenomenon in which polaritons, hybrid particles that are a mixture of photons and excitons, exhibit coherent and directional emission of light. This process is significant in the field of quantum optics and nanophotonics, as it allows for the creation of compact, efficient, and low-threshold lasers. Polariton lasing occurs in semiconductor microcavities, where strong coupling between photons and excitons leads to the formation of polariton modes. These modes can undergo Bose-Einstein condensation, a phase transition where a large fraction of particles occupy the same quantum state, resulting in coherent light emission. The threshold for polariton lasing is typically much lower than that of conventional lasers, making it an attractive option for on-chip optical devices. Additionally, polariton lasing can be tuned by varying the cavity parameters, such as the cavity length or the refractive index, allowing for the creation of tunable lasers. However, one of the challenges in polariton lasing is the short lifetime of excitons, which can limit the coherence and efficiency of the emitted light. Research in this area continues to focus on improving the coherence time and efficiency of polariton lasers, as well as exploring their potential applications in quantum computing and communication.