Observation of rotational coherence in an excited state of CO

Y. X. Wan; B. T. Fu; H. Q. Xie; S. P. Yu; H. B. Lei; F. B. Zhang; Z. H. Zhang; L. L. Qiao; G. H. Li; J. Zhao; Z. X. Zhao; J. P. Yao; Y. Cheng

doi:10.1364/OL.432315

Observation of rotational coherence in an excited state of CO

Y. X. Wan
, B. T. Fu
, H. Q. Xie
, S. P. Yu
, H. B. Lei
, F. B. Zhang
, Z. H. Zhang
, L. L. Qiao
, G. H. Li
, J. Zhao
, Z. X. Zhao
, J. P. Yao
, Y. Cheng

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The vacuum ultraviolet (VUV) radiation is generated in the strong-field-ionized CO molecules through 2 + 1 resonance excitation with two-color femtosecond laser pulses. When scanning the relative delay between two pump pulses, the rotational-resolved VUV radiations show periodic oscillations lasting as long as 500 ps. Fourier analysis reveals that these oscillations correspond to rotational beat frequencies of the A²5_i state of CO⁺, which is the result of multi-channel interference during the resonant excitation process. High resolution of Fourier transform spectra up to 0.067 cm⁻¹ allows us to obtain the fine energy levels of the A²5_i state. The theoretical calculation is in good agreement with the experimental observation. This work reveals the rotational coherence of the ionic excited state and shows the prospect of rotational coherence spectroscopy in measuring fine structures of molecular ions.

Original language	English
Pages (from-to)	3893-3896
Number of pages	4
Journal	Optics Letters
Volume	46
Issue number	16
DOIs	https://doi.org/10.1364/OL.432315
State	Published - 15 Aug 2021
Externally published	Yes

Access to Document

10.1364/OL.432315

Cite this

@article{3ff1d1bcb3bd46c8ae15d6066efeb991,

title = "Observation of rotational coherence in an excited state of CO",

abstract = "The vacuum ultraviolet (VUV) radiation is generated in the strong-field-ionized CO molecules through 2 + 1 resonance excitation with two-color femtosecond laser pulses. When scanning the relative delay between two pump pulses, the rotational-resolved VUV radiations show periodic oscillations lasting as long as 500 ps. Fourier analysis reveals that these oscillations correspond to rotational beat frequencies of the A25i state of CO+, which is the result of multi-channel interference during the resonant excitation process. High resolution of Fourier transform spectra up to 0.067 cm−1 allows us to obtain the fine energy levels of the A25i state. The theoretical calculation is in good agreement with the experimental observation. This work reveals the rotational coherence of the ionic excited state and shows the prospect of rotational coherence spectroscopy in measuring fine structures of molecular ions.",

author = "Wan, \{Y. X.\} and Fu, \{B. T.\} and Xie, \{H. Q.\} and Yu, \{S. P.\} and Lei, \{H. B.\} and Zhang, \{F. B.\} and Zhang, \{Z. H.\} and Qiao, \{L. L.\} and Li, \{G. H.\} and J. Zhao and Zhao, \{Z. X.\} and Yao, \{J. P.\} and Y. Cheng",

note = "Publisher Copyright: {\textcopyright} 2021 Optical Society of America",

year = "2021",

month = aug,

day = "15",

doi = "10.1364/OL.432315",

language = "英语",

volume = "46",

pages = "3893--3896",

journal = "Optics Letters",

issn = "0146-9592",

publisher = "Optica Publishing Group (formerly OSA)",

number = "16",

}

TY - JOUR

T1 - Observation of rotational coherence in an excited state of CO

AU - Wan, Y. X.

AU - Fu, B. T.

AU - Xie, H. Q.

AU - Yu, S. P.

AU - Lei, H. B.

AU - Zhang, F. B.

AU - Zhang, Z. H.

AU - Qiao, L. L.

AU - Li, G. H.

AU - Zhao, J.

AU - Zhao, Z. X.

AU - Yao, J. P.

AU - Cheng, Y.

PY - 2021/8/15

Y1 - 2021/8/15

N2 - The vacuum ultraviolet (VUV) radiation is generated in the strong-field-ionized CO molecules through 2 + 1 resonance excitation with two-color femtosecond laser pulses. When scanning the relative delay between two pump pulses, the rotational-resolved VUV radiations show periodic oscillations lasting as long as 500 ps. Fourier analysis reveals that these oscillations correspond to rotational beat frequencies of the A25i state of CO+, which is the result of multi-channel interference during the resonant excitation process. High resolution of Fourier transform spectra up to 0.067 cm−1 allows us to obtain the fine energy levels of the A25i state. The theoretical calculation is in good agreement with the experimental observation. This work reveals the rotational coherence of the ionic excited state and shows the prospect of rotational coherence spectroscopy in measuring fine structures of molecular ions.

AB - The vacuum ultraviolet (VUV) radiation is generated in the strong-field-ionized CO molecules through 2 + 1 resonance excitation with two-color femtosecond laser pulses. When scanning the relative delay between two pump pulses, the rotational-resolved VUV radiations show periodic oscillations lasting as long as 500 ps. Fourier analysis reveals that these oscillations correspond to rotational beat frequencies of the A25i state of CO+, which is the result of multi-channel interference during the resonant excitation process. High resolution of Fourier transform spectra up to 0.067 cm−1 allows us to obtain the fine energy levels of the A25i state. The theoretical calculation is in good agreement with the experimental observation. This work reveals the rotational coherence of the ionic excited state and shows the prospect of rotational coherence spectroscopy in measuring fine structures of molecular ions.

UR - https://www.scopus.com/pages/publications/85112262869

U2 - 10.1364/OL.432315

DO - 10.1364/OL.432315

M3 - 文章

C2 - 34388768

AN - SCOPUS:85112262869

SN - 0146-9592

VL - 46

SP - 3893

EP - 3896

JO - Optics Letters

JF - Optics Letters

IS - 16

ER -

Observation of rotational coherence in an excited state of CO

Abstract

Access to Document

Other files and links

Fingerprint

Cite this