Reconfigurable re-entrant cavity for wireless coupling to an electro-optomechanical device

Area of Science:

• Quantum engineering
• Optomechanics
• Superconducting circuits

Background:

• Superconducting qubits require robust interfaces for quantum information processing.
• Existing microwave-to-optics converters face challenges in assembly and performance tuning.
• Optical networks are crucial for scalable quantum computing architectures.

Purpose of the Study:

• To present an improved electro-optomechanical converter design for microwave-to-optics conversion.
• To simplify the optical assembly and decouple it from the microwave setup.
• To enhance the performance and compatibility of converters for superconducting qubit networks.

Main Methods:

• Utilized a three-dimensional microwave cavity for enhanced coupling.
• Integrated an LC resonator onto the converter chip.
• Employed a modular device assembly for flexible tuning and testing.

Main Results:

• Demonstrated a simplified optical assembly decoupled from the microwave setup.
• Achieved flexible tuning of microwave coupling with minimal loss.
• Confirmed no adverse impact on electromechanical experiments from the microwave cavity.

Conclusions:

• The improved design offers a modular and tunable solution for microwave-to-optics conversion.
• Enhanced compatibility with high-finesse optical cavities promises better optical performance.
• This advancement facilitates the development of optical networks for superconducting qubits.