研究目的
Investigating the ultrastrong coupling of Landau level transitions in a two-dimensional electron gas to terahertz metasurfaces and the effects of reducing the capacitive gap of the resonator on the coupling rate and polariton branch broadening.
研究成果
The study demonstrates that reducing the capacitive gap of the resonator increases the coupling rate but also introduces inhomogeneous broadening of the upper polariton branch below a threshold gap width. Future work includes the implementation of a gate to modify the electron density below the gap, which may help retrieve the broadening of the upper polariton.
研究不足
The study observes that below a certain gap size, the upper polariton starts to broaden and its frequency cannot be measured accurately anymore. The system cannot be fully described by the Hopfield model, indicating limitations in the current theoretical understanding.
