Nonreciprocal reconfigurable microwave optomechanical circuit.

Abstract:

:Nonreciprocal microwave devices are ubiquitous in radar and radio communication and indispensable in the readout chains of superconducting quantum circuits. Since they commonly rely on ferrite materials requiring large magnetic fields that make them bulky and lossy, there has been significant interest in magnetic-field-free on-chip alternatives, such as those recently implemented using the Josephson nonlinearity. Here, we realize reconfigurable nonreciprocal transmission between two microwave modes using purely optomechanical interactions in a superconducting electromechanical circuit. The scheme relies on the interference in two mechanical modes that mediate coupling between the microwave cavities and requires no magnetic field. We analyse the isolation, transmission and the noise properties of this nonreciprocal circuit. Finally, we show how quantum-limited circulators can be realized with the same principle. All-optomechanically mediated nonreciprocity demonstrated here can also be extended to directional amplifiers, and it forms the basis towards realizing topological states of light and sound.Nonreciprocal optical devices traditionally rely on magnetic fields and magnetic-free approaches are rather recent. Here, Bernier et al. propose and demonstrate a purely optomechanical circulator with reconfigurable transmission without the need for direct coupling between input and output modes.

journal_name

Nat Commun

journal_title

Nature communications

authors

Bernier NR,Tóth LD,Koottandavida A,Ioannou MA,Malz D,Nunnenkamp A,Feofanov AK,Kippenberg TJ

doi

10.1038/s41467-017-00447-1

subject

Has Abstract

pub_date

2017-09-19 00:00:00

pages

604

issue

1

issn

2041-1723

pii

10.1038/s41467-017-00447-1

journal_volume

8

pub_type

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