Feedback cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

Felix Tebbenjohanns; Jihao Jia; Michael Antesberger; Adarsh Shankar Prasad; Sebastian Pucher; Arno Rauschenbeutel; Jürgen Volz; Philipp Schneeweiss

doi:10.1103/PhysRevA.108.L031101

Letter

Feedback cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

Felix Tebbenjohanns¹, Jihao Jia¹, Michael Antesberger^2,*, Adarsh Shankar Prasad², Sebastian Pucher ^1,†, Arno Rauschenbeutel ^1,2, Jürgen Volz ^1,2, and Philipp Schneeweiss ^1,2,‡

¹Department of Physics, Humboldt-Universität zu Berlin, 10099 Berlin, Germany
²Vienna Center for Quantum Science and Technology, TU Wien-Atominstitut, Stadionallee 2, 1020 Vienna, Austria

^*Present address: University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology, Boltzmanngasse 5, 1090 Vienna, Austria.
^†Present address: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany.
^‡philipp.schneeweiss@hu-berlin.de

PDF

Phys. Rev. A 108, L031101 – Published 8 September, 2023

DOI: https://doi.org/10.1103/PhysRevA.108.L031101

Abstract

We experimentally study the fundamental torsional mechanical mode of the nanofiber waist of a tapered optical fiber. We find that this oscillator with a resonance frequency of $f = 161.7 kHz$ features a quality factor of up to $Q = 10^{7}$ and a $Q$ -frequency product of $Q f = 1 THz$ . The polarization fluctuations of a transmitted laser field serve as a probe for the torsional motion. We damp the oscillator's thermal motion from room temperature to 28(7) mK by means of active feedback. Our results might enable new types of fiber-based sensors and lay the foundation for a promising hybrid quantum optomechanical platform.

Physical Review A

Export citation

Export citation

Feedback cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Feedback cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)