Near-field coupling of a levitated nanoparticle to a photonic crystal cavity
Posted on 2018-12-13 - 14:39
Quantum control of levitated dielectric particles is an emerging subject in quantum optomechanics. A major challenge is to efficiently measure and manipulate the particle's motion at the Heisenberg uncertainty limit. Here we present a nanophotonic interface suited to address this problem. By optically trapping a 150 nm silica particle and placing it in the near field of a photonic crystal cavity, we achieve tunable single-photon optomechanical coupling of up to $g_0/2\pi=9$~kHz, three orders of magnitude larger than previously reported for levitated cavity optomechanical systems. An efficient collection and guiding of light through the nanophotonic structure results in a per-photon displacement sensitivity that is increased by two orders of magnitude compared to conventional far-field detection. The demonstrated performance shows a promising route for room temperature quantum optomechanics.
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Magrini, Lorenzo; Norte, Richard; Riedinger, Ralf; Marinković, Igor; Grass, David; Delić, Uroš; et al. (2018). Near-field coupling of a levitated nanoparticle to a photonic crystal cavity. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4296377.v1
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AUTHORS (9)
LM
Lorenzo Magrini
RN
Richard Norte
RR
Ralf Riedinger
IM
Igor Marinković
DG
David Grass
UD
Uroš Delić
SG
Simon Gröblacher
SH
Sungkun Hong
MA
Markus Aspelmeyer