Enabling multiple intercavity polariton coherences by adding quantum confinement to cavity molecular polaritons

In this study, the particle in a box idea, which was broadly developed in semiconductor quantum dot research, was extended into mid-infrared (IR) cavity modes by applying lateral confinement in an optical cavity. The discrete cavity modes hybridized with molecular vibrational modes, resulting in a quartet of polariton states that can support multiple coherence states in the IR regime. We applied tailored pump pulse sequences to selectively prepare these coherences and verified the multi-coherence existence. The simulation based on Lindblad equation showed that because the quartet of polariton states resided in the same cavity, they were specifically robust toward decoherence caused by fluctuations in space. The multiple robust coherences paved the way for entangled states and coherent interactions between cavity polaritons, which would be critical for advancing polariton-based quantum information technology.

Automated summary

In this study, the concept of "particle in a box", widely developed in semiconductor quantum dot research, was extended into mid-infrared (IR) cavity modes with lateral confinement in an optical cavity. The resulting quartet of polariton states, formed by the hybridization of discrete cavity modes with molecular vibrational modes, can support multiple coherence states in the IR regime. Through tailored pump pulse sequences, these coherences were selectively prepared and the existence of multiple coherences was verified. The simulation based on Lindblad equation demonstrated that the quartet of polariton states residing in the same cavity were specifically robust against decoherence caused by fluctuations in space. The presence of multiple robust coherences lays the foundation for entangled states and coherent interactions between cavity polaritons, which is crucial for advancing polariton-based quantum information technology.