Optical nonreciprocity in a piezo-optomechanical system |
Schematic diagram of our proposed scheme. The piezo-optomechanical microresonator is optically driven by a pump field (amplitude εl, frequency ωl) and two probe fields (amplitude εpa, frequency ωpa, amplitude εpc, frequency ωpc), and piezoelectrically driven by a microwave field with frequency ωd. |