Enhanced Charge Transport in Two-Dimensional Materials through Light-Matter Strong Coupling

Strong light-matter interaction of functional materials is emerging as a promising area of research. Recent experiments suggest that material properties like charge transport can be controlled by coupling to a vacuum electromagnetic field. Here, we explored the design of a Fabry-Perot cavity in a field-effect transistor configuration and studied the charge transport in two-dimensional materials. The optical and electrical measurements of strongly coupled WS2 suggest an enhancement of electron transport at room temperature. Electron mobility is enhanced more than 50 times at ON resonance conditions. Similarly, I-on/I-off ratio of the device increased by 2 orders of magnitude without chemical modification of the active layer. Cavity tuning and coupling strength-dependent studies support the evidence of modifying the electronic properties of the coupled system. A clear correlation in the effective mass of the polaritonic state and Schottky barrier height indicates a collective nature of light-matter interaction.

Automated summary

Recent experiments show that material properties like charge transport can be controlled by coupling to a vacuum electromagnetic field. The study found that in strongly coupled WS2, electron mobility is enhanced over 50 times at room temperature, and the I-on/I-off ratio of the device increases by 2 orders of magnitude without chemical modification of the active layer. These results suggest a promising way of modifying electronic properties by strong light-matter interaction.