Optomechanical feedback cooling of a 5  mm long torsional mode

We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm long, 550 nm diameter optical nanofiber. The rotation of the nanofiber couples to the polarization of guided laser fields. We use a weak laser probe to monitor the rotation and use feedback to modulate th...

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Bibliographic Details
Published in:Photonics research (Washington, DC) DC), 2023-12, Vol.11 (12), p.2179
Main Authors: Su, Dianqiang, Jiang, Yuan, Solano, Pablo, Orozco, Luis A., Lawall, John, Zhao, Yanting
Format: Article
Language:English
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Summary:We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm long, 550 nm diameter optical nanofiber. The rotation of the nanofiber couples to the polarization of guided laser fields. We use a weak laser probe to monitor the rotation and use feedback to modulate the polarization of an auxiliary drive laser providing torque. Our results present a tool for the optomechanical control of large-scale torsional resonators, with metrological applications and potential implications for studying macroscopic objects in quantum states.
ISSN:2327-9125
2327-9125
DOI:10.1364/PRJ.487035