Mechanical on-chip microwave circulator

S. Barzanjeh (), M. Wulf, M. Peruzzo, M. Kalaee, P. B. Dieterle, O. Painter and J. M. Fink ()
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S. Barzanjeh: Institute of Science and Technology Austria
M. Wulf: Institute of Science and Technology Austria
M. Peruzzo: Institute of Science and Technology Austria
M. Kalaee: Kavli Nanoscience Institute and Thomas J. Watson, Sr., Laboratory of Applied Physics, California Institute of Technology
P. B. Dieterle: Kavli Nanoscience Institute and Thomas J. Watson, Sr., Laboratory of Applied Physics, California Institute of Technology
O. Painter: Kavli Nanoscience Institute and Thomas J. Watson, Sr., Laboratory of Applied Physics, California Institute of Technology
J. M. Fink: Institute of Science and Technology Austria

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking of time-reversal symmetry, typically achieved using magnetic materials and more recently using the quantum Hall effect, parametric permittivity modulation or Josephson nonlinearities. Here we demonstrate an on-chip magnetic-free circulator based on reservoir-engineered electromechanic interactions. Directional circulation is achieved with controlled phase-sensitive interference of six distinct electro-mechanical signal conversion paths. The presented circulator is compact, its silicon-on-insulator platform is compatible with both superconducting qubits and silicon photonics, and its noise performance is close to the quantum limit. With a high dynamic range, a tunable bandwidth of up to 30 MHz and an in situ reconfigurability as beam splitter or wavelength converter, it could pave the way for superconducting qubit processors with multiplexed on-chip signal processing and readout.

Date: 2017
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DOI: 10.1038/s41467-017-01304-x

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