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Quantum capacitance mediated carbon nanotube optomechanics

Author

Listed:
  • Stefan Blien

    (University of Regensburg)

  • Patrick Steger

    (University of Regensburg)

  • Niklas Hüttner

    (University of Regensburg)

  • Richard Graaf

    (University of Regensburg)

  • Andreas K. Hüttel

    (University of Regensburg
    Aalto University)

Abstract

Cavity optomechanics allows the characterization of a vibration mode, its cooling and quantum manipulation using electromagnetic fields. Regarding nanomechanical as well as electronic properties, single wall carbon nanotubes are a prototypical experimental system. At cryogenic temperatures, as high quality factor vibrational resonators, they display strong interaction between motion and single-electron tunneling. Here, we demonstrate large optomechanical coupling of a suspended carbon nanotube quantum dot and a microwave cavity, amplified by several orders of magnitude via the nonlinearity of Coulomb blockade. From an optomechanically induced transparency (OMIT) experiment, we obtain a single photon coupling of up to g0 = 2π ⋅ 95 Hz. This indicates that normal mode splitting and full optomechanical control of the carbon nanotube vibration in the quantum limit is reachable in the near future. Mechanical manipulation and characterization via the microwave field can be complemented by the manifold physics of quantum-confined single electron devices.

Suggested Citation

  • Stefan Blien & Patrick Steger & Niklas Hüttner & Richard Graaf & Andreas K. Hüttel, 2020. "Quantum capacitance mediated carbon nanotube optomechanics," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15433-3
    DOI: 10.1038/s41467-020-15433-3
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