Journal article 4 views
Backaction suppression in levitated optomechanics using reflective boundaries
Physical Review Research, Volume: 7, Issue: 2, Start page: 023041
Swansea University Authors:
Rafal Gajewski, James Bateman
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DOI (Published version): 10.1103/physrevresearch.7.023041
Abstract
We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilizing a suitable reflective boundary. We examine the spherical mirror geometry as a case study of this backaction suppression effect,...
| Published in: | Physical Review Research |
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| ISSN: | 2643-1564 |
| Published: |
American Physical Society (APS)
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa69040 |
| Abstract: |
We show theoretically that the noise due to laser induced backaction acting on a small nanosphere levitated in a standing-wave trap can be considerably reduced by utilizing a suitable reflective boundary. We examine the spherical mirror geometry as a case study of this backaction suppression effect, discussing the theoretical and experimental constraints. We study the effects of laser recoil directly, by analyzing optical force fluctuations acting on a dipolar particle trapped at the center of a spherical mirror. We also compute the corresponding measurement imprecision in an interferometric, shot-noise-limited position measurement, using the formalism of Fisher information flow. Our results show that the standing-wave trapping field is necessary for backaction suppression in three dimensions, and they satisfy the Heisenberg limit of detection. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
R.G. was supported by the U.K. Engineering and Physical Sciences Research Council through a Standard Research Studentship (Doctoral Training Partnership) Grant No. EP/T517987/1. |
| Issue: |
2 |
| Start Page: |
023041 |