Vacuum ultraviolet dual-comb spectroscopy.
- 1James C. Wyant College of Optical Sciences, University of Arizona, Tucson, AZ, USA.
- 2Department of Physics, University of Arizona, Tucson, AZ, USA.
- 3James C. Wyant College of Optical Sciences, University of Arizona, Tucson, AZ, USA. [email protected].
Abstract
The optical frequency comb has made a significant impact in precision spectroscopy and on our ability to probe atomic, molecular and, recently, nuclear transitions to further our understanding of their fundamental properties and how their dynamics and complex interactions affect the observed world. To expand the energy scales and types of systems that can be studied, frequency comb sources from terahertz to vacuum ultraviolet frequencies and beyond have been pursued. Dual-comb spectroscopy, enabled by the development of these frequency comb sources, allows broadband absorption measurements of complicated spectra, exceeding the limitations of direct, single-comb spectroscopy. To date, however, the dual-comb approach has not been able to directly access many important transitions that lie at challenging vacuum ultraviolet wavelengths. Here, we demonstrate dual-comb spectroscopy in the vacuum ultraviolet utilizing intracavity high harmonic generation. This multi-harmonic source is used to measure molecular absorbance spectra at λ = 210 nm and λ = 149 nm from room-temperature samples of acetylene and ammonia, respectively. These measurements resolve the Doppler broadened structure of congested molecular spectra with absolute frequency accuracy. Noise contributions to the vacuum ultraviolet dual-comb spectroscopy measurements are characterized, guiding future efforts and technological development in this region.
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BibTeX
@article{mccauley2026vacuum,
title = {{Vacuum ultraviolet dual-comb spectroscopy.}},
author = {John J McCauley and Dylan P Tooley and R Jason Jones},
journal = {Nature communications},
year = {2026},
month = sep,
doi = {10.1038/s41467-026-77763-y},
url = {https://europepmc.org/article/MED/42907442},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Vacuum ultraviolet dual-comb spectroscopy.
AU - John J McCauley
AU - Dylan P Tooley
AU - R Jason Jones
PY - 2026
DA - 2026/09/21
JO - Nature communications
DO - 10.1038/s41467-026-77763-y
UR - https://europepmc.org/article/MED/42907442
AB - The optical frequency comb has made a significant impact in precision spectroscopy and on our ability to probe atomic, molecular and, recently, nuclear transitions to further our understanding of their fundamental properties and how their dynamics and complex interactions affect the observed world. To expand the energy scales and types of systems that can be studied, frequency comb sources from terahertz to vacuum ultraviolet frequencies and beyond have been pursued. Dual-comb spectroscopy, enabled by the development of these frequency comb sources, allows broadband absorption measurements of complicated spectra, exceeding the limitations of direct, single-comb spectroscopy. To date, however, the dual-comb approach has not been able to directly access many important transitions that lie at challenging vacuum ultraviolet wavelengths. Here, we demonstrate dual-comb spectroscopy in the vacuum ultraviolet utilizing intracavity high harmonic generation. This multi-harmonic source is used to measure molecular absorbance spectra at λ = 210 nm and λ = 149 nm from room-temperature samples of acetylene and ammonia, respectively. These measurements resolve the Doppler broadened structure of congested molecular spectra with absolute frequency accuracy. Noise contributions to the vacuum ultraviolet dual-comb spectroscopy measurements are characterized, guiding future efforts and technological development in this region.
SN - 2041-1723
ER -