Chi Xiong, Yves Martin, et al.
SPIE OPTO 2019
High efficiency microwave-optical transduction for quantum-state transfer remains an outstanding technical challenge. Resonant electro-optic transduction via three-wave mixing is an attractive solution, with a simple operating principle that does not rely on intermediate quantum states. However, the intrinsic optical and microwave losses of electro-optic materials with large Pockels coefficients have limited the conversion efficiency of existing devices. Here, we show that an optimal conversion efficiency can be achieved with a relatively weak linear electro-optic material, as long as both the optical and microwave quality factors are high. We then discuss specific designs for electro-optic quantum transducers based on superconducting microwave resonators coupled to SiGe/Si ring resonators. We theoretically show that applying an electric field to the SiGe/Si waveguides induces an effective Pockels effect, allowing three-wave mixing without introducing loss. Together with its excellent compatibility with superconducting qubit fabrication, these nonlinear optical properties promise to make the SiGe/Si platform an exciting avenue for quantum-state frequency conversion.
Chi Xiong, Yves Martin, et al.
SPIE OPTO 2019
Gokul Subramanian Ravi, Jonathan M. Baker, et al.
ASPLOS 2023
Hanhee Paik, Srikanth Srinivasan, et al.
IEDM 2020
Etsuki Kobiyama, Gabriele Rainò, et al.
MRS Fall Meeting 2022