Pressure-Controlled Optomechanical Coupling and Cavity Cooling in Integrated Devices

Optomechanical cavities have been extensively investigated in both ambient and vacuum environments, providing key insights into light–matter interactions at the micro- and nanoscale. Yet, scalable integrated architectures capable of maintaining stable and tunable optomechanical coupling under variable pressure conditions essential for space and quantum technologies require further development.

In this work, we present a compact, multifunctional optomechanical platform that integrates lasing, cavity cooling, and tunable optical feedback within a single device. The system is characterized across a broad range of ambient pressures, from atmospheric to high vacuum, revealing pressure-dependent modulation of resonance, linewidth, and optomechanical backaction. We demonstrate active control of the cavity resonance drift via mechanical feedback.

Our results show that pressure-controlled ambient acts as a practical control parameter for linewidth narrowing, resonance drift compensation, and cooling efficiency. This approach provides a simple and scalable pathway toward pressure-adaptive optomechanical platforms, relevant for quantum technologies, precision metrology, and space applications requiring long-term stability and environmental robustness.