Developing a Universal Open Microcavity System with Tunable Cavity Length for Light-Matter Interaction Exploration

We have developed an open microcavity system with an electrically tunable cavity length. In its current plano-cavity configuration, we have achieved a 1.2 µm cavity length, corresponding to a free spectral range (FSR) of approximately 140 nm. This offers a universal platform to explore strong light-matter coupling with various materials in microcavity systems. Preliminary results indicate an anti-crossing pattern characteristic of the strong coupling regime, with a measured Rabi splitting of approximately 0.1 eV.