Resonant Optomechanics with a Vibrating Carbon Nanotube and a Radio-Frequency Cavity.
In an optomechanical setup, the coupling between cavity and resonator can be increased by tuning them to the same frequency. We study this interaction between a carbon nanotube resonator and a radio-frequency tank circuit acting as a cavity. In this resonant regime, the vacuum optomechanical coupling is enhanced by the dc voltage coupling the cavity and the mechanical resonator. Using the cavity to detect the nanotube's motion, we observe and simulate interference between mechanical and electrical oscillations. We measure the mechanical ring down and show that further improvements to the system could enable the measurement of mechanical motion at the quantum limit.
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Ares
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Pei
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Mavalankar
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Mergenthaler
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Warner
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Briggs
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom.
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Laird