An Optomechanical Transducer for Quantum State Transfer Between Infrared Light and Microwave. Part II: Measurement Results*

Optomechanical systems provide a very interesting approach to frequency conversion between the microwave and optical domains, and in particular could provide a means to couple superconducting qubits to infrared telecommunications-wavelength signals. This capability would provide a compelling means to long-distance quantum communication. We have combined an aluminum nitride-based interdigital transducer (IDT) with a silicon-based one-dimensional optomechanical resonator, which together promise the necessary optomechanical and electromechanical coupling rates that would allow us to efficiently convert signals between infrared light and microwave electrical signals. We will present recent results using this device, including characterization of the electromechanical and optomechanical elements as well as classical operation using continuous-wave and time-domain signals.