Selected Publications

Realization of Directional Amplification in a Microwave Optomechanical Device

L. Mercier de Lapinay, E. Damskägg, C. F. Ockeloen-Korppi, M. A. Sillanpää

Directional transmission or amplification of microwave signals is indispensable in various applications involving sensitive measurements. In this work we show experimentally how to use a generic cavity optomechanical setup to nonreciprocally amplify microwave signals above 3 GHz in one direction by 9 dB and simultaneously attenuate the transmission in the opposite direction by 21 dB. We use a device including two on-chip superconducting resonators and two metallic drumhead mechanical oscillators. Application of four microwave pump-tone frequencies allows the design of constructive or destructive interference for a signal tone depending on the propagation direction. The device can also be configured as an isolator with lossless nonreciprocal transmission and 18 dB of isolation.

Phys Rev Appl 11, 034027 (2019)

doi: 10.1103/PhysRevApplied.11.034027