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Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene
We review the recent developments in precision ro-vibrational spectroscopy of buffer-gas-cooled neutral molecules, obtained using infrared frequency combs either as direct probe sources or as ultra-accurate optical rulers. In particular, we show how coherent broadband spectroscopy of complex molecul...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7795711/ https://www.ncbi.nlm.nih.gov/pubmed/33383699 http://dx.doi.org/10.3390/ijms22010250 |
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author | Santamaria, Luigi Di Sarno, Valentina Aiello, Roberto De Rosa, Maurizio Ricciardi, Iolanda De Natale, Paolo Maddaloni, Pasquale |
author_facet | Santamaria, Luigi Di Sarno, Valentina Aiello, Roberto De Rosa, Maurizio Ricciardi, Iolanda De Natale, Paolo Maddaloni, Pasquale |
author_sort | Santamaria, Luigi |
collection | PubMed |
description | We review the recent developments in precision ro-vibrational spectroscopy of buffer-gas-cooled neutral molecules, obtained using infrared frequency combs either as direct probe sources or as ultra-accurate optical rulers. In particular, we show how coherent broadband spectroscopy of complex molecules especially benefits from drastic simplification of the spectra brought about by cooling of internal temperatures. Moreover, cooling the translational motion allows longer light-molecule interaction times and hence reduced transit-time broadening effects, crucial for high-precision spectroscopy on simple molecules. In this respect, we report on the progress of absolute frequency metrology experiments with buffer-gas-cooled molecules, focusing on the advanced technologies that led to record measurements with acetylene. Finally, we briefly discuss the prospects for further improving the ultimate accuracy of the spectroscopic frequency measurement. |
format | Online Article Text |
id | pubmed-7795711 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-77957112021-01-10 Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene Santamaria, Luigi Di Sarno, Valentina Aiello, Roberto De Rosa, Maurizio Ricciardi, Iolanda De Natale, Paolo Maddaloni, Pasquale Int J Mol Sci Review We review the recent developments in precision ro-vibrational spectroscopy of buffer-gas-cooled neutral molecules, obtained using infrared frequency combs either as direct probe sources or as ultra-accurate optical rulers. In particular, we show how coherent broadband spectroscopy of complex molecules especially benefits from drastic simplification of the spectra brought about by cooling of internal temperatures. Moreover, cooling the translational motion allows longer light-molecule interaction times and hence reduced transit-time broadening effects, crucial for high-precision spectroscopy on simple molecules. In this respect, we report on the progress of absolute frequency metrology experiments with buffer-gas-cooled molecules, focusing on the advanced technologies that led to record measurements with acetylene. Finally, we briefly discuss the prospects for further improving the ultimate accuracy of the spectroscopic frequency measurement. MDPI 2020-12-29 /pmc/articles/PMC7795711/ /pubmed/33383699 http://dx.doi.org/10.3390/ijms22010250 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Santamaria, Luigi Di Sarno, Valentina Aiello, Roberto De Rosa, Maurizio Ricciardi, Iolanda De Natale, Paolo Maddaloni, Pasquale Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title | Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title_full | Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title_fullStr | Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title_full_unstemmed | Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title_short | Infrared Comb Spectroscopy of Buffer-Gas-Cooled Molecules: Toward Absolute Frequency Metrology of Cold Acetylene |
title_sort | infrared comb spectroscopy of buffer-gas-cooled molecules: toward absolute frequency metrology of cold acetylene |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7795711/ https://www.ncbi.nlm.nih.gov/pubmed/33383699 http://dx.doi.org/10.3390/ijms22010250 |
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