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Q: Fachverband Quantenoptik und Photonik

Q 48: Optomechanics I

Q 48.4: Vortrag

Donnerstag, 9. März 2017, 15:15–15:30, P 4

Cavity optomechanics with levitated nanospheres at low pressures — •Uros Delic, David Grass, Nikolai Kiesel, and Markus Aspelmeyer — Faculty of Physics, University of Vienna, Vienna, Austria

In recent years cavity cooling of levitated nanospheres has been demonstrated in multiple experiments [1, 2]. However, regime of high cooperativity C>1 is yet to be reached, leading to ground state cooling of nanosphere center-of-mass motion and full quantum control of nanosphere motion. A common obstacle in many experiments is stable levitation of nanospheres at low pressures, which has so far been shown in hybrid electro-optical systems [2] and in optical tweezers [3, 4].

We report on progress of combining stable optical levitation in optical tweezers with an optical cavity to reach a regime of high cooperativity at low pressures. We will present first results on coupling a nanosphere levitated by tweezers to the optical cavity. We will discuss further improvements to the experiment necessary to reach quantum control of nanosphere motion.

[1] Kiesel et al., PNAS 110: 14180-14185 (2013) [2] Millen et al., Phys. Rev. Lett. 114, 123602 (2015); Millen et al., Phys. Rev. Lett. 117, 173602 (2016) [3] Jain et al., Phys. Rev. Lett. 116, 243601 (2016) [4] Mestres et al., Appl. Phys. Lett. 107, 151102 (2015)