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Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever

This study describes a new two-step process to cool the thermal vibration of microcantilevers. The process combines active mechanical feedback cooling and optical cavity cooling. A micro-Fabry–Perot interferometer, built in-house, is set atop a microcantilever to measure the vibration amplitude, the...

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Detalles Bibliográficos
Autor principal: Kawamura, Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6910902/
https://www.ncbi.nlm.nih.gov/pubmed/31836770
http://dx.doi.org/10.1038/s41598-019-55496-x
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author Kawamura, Y.
author_facet Kawamura, Y.
author_sort Kawamura, Y.
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description This study describes a new two-step process to cool the thermal vibration of microcantilevers. The process combines active mechanical feedback cooling and optical cavity cooling. A micro-Fabry–Perot interferometer, built in-house, is set atop a microcantilever to measure the vibration amplitude, the high optical power density of which induces cavity cooling in the optical cavity. Using a two-step cooling procedure, the equivalent temperature of the thermal vibration of a microcantilever is lowered from room temperature to the theoretical cooling limit of 0.063 K, a much lower temperature than that achieved via simple cavity cooling (18 K), and then by mechanical feedback cooling (0.135 K) obtained for the same type of microcantilevers in previous studies. This experimental demonstration showcases a new type of cooling process of the amplitude of thermal vibration for micro-mechanical resonators to a lower temperature and does not need additional cooling using a conventional cryogenic refrigerator.
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spelling pubmed-69109022019-12-16 Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever Kawamura, Y. Sci Rep Article This study describes a new two-step process to cool the thermal vibration of microcantilevers. The process combines active mechanical feedback cooling and optical cavity cooling. A micro-Fabry–Perot interferometer, built in-house, is set atop a microcantilever to measure the vibration amplitude, the high optical power density of which induces cavity cooling in the optical cavity. Using a two-step cooling procedure, the equivalent temperature of the thermal vibration of a microcantilever is lowered from room temperature to the theoretical cooling limit of 0.063 K, a much lower temperature than that achieved via simple cavity cooling (18 K), and then by mechanical feedback cooling (0.135 K) obtained for the same type of microcantilevers in previous studies. This experimental demonstration showcases a new type of cooling process of the amplitude of thermal vibration for micro-mechanical resonators to a lower temperature and does not need additional cooling using a conventional cryogenic refrigerator. Nature Publishing Group UK 2019-12-13 /pmc/articles/PMC6910902/ /pubmed/31836770 http://dx.doi.org/10.1038/s41598-019-55496-x Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kawamura, Y.
Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title_full Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title_fullStr Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title_full_unstemmed Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title_short Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
title_sort mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6910902/
https://www.ncbi.nlm.nih.gov/pubmed/31836770
http://dx.doi.org/10.1038/s41598-019-55496-x
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