Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer
High-harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in the amplitude and phase of high-harmonic generation (HHG) signals. However, measurement of the harmonic phase is a daunting task. Here, we present a precise measurement of HHG phase difference...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2022-01-01
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| Series: | Ultrafast Science |
| Online Access: | http://dx.doi.org/10.34133/2022/9834102 |
| _version_ | 1811179694668644352 |
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| author | Mumta Hena Mustary Liang Xu Wanyang Wu Nida Haram Dane E. Laban Han Xu Feng He R. T. Sang Igor V. Litvinyuk |
| author_facet | Mumta Hena Mustary Liang Xu Wanyang Wu Nida Haram Dane E. Laban Han Xu Feng He R. T. Sang Igor V. Litvinyuk |
| author_sort | Mumta Hena Mustary |
| collection | DOAJ |
| description | High-harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in the amplitude and phase of high-harmonic generation (HHG) signals. However, measurement of the harmonic phase is a daunting task. Here, we present a precise measurement of HHG phase difference between two isotopes of molecular hydrogen using the advanced extreme-ultraviolet (XUV) Gouy phase interferometer. The measured phase difference is about 200 mrad, corresponding to ~3 attoseconds (1 as=10−18 s) time delay which is nearly independent of harmonic order. The measurements agree very well with numerical calculations of a four-dimensional time-dependent Schödinger equation. Numerical simulations also reveal the effects of molecular orientation and intramolecular two-center interference on the measured phase difference. This technique opens a new avenue for measuring the phase of harmonic emission for different atoms and molecules. Together with isomeric or isotopic comparisons, it also enables the observation of subtle effects of molecular structures and nuclear motion on electron dynamics in strong laser fields. |
| first_indexed | 2024-04-11T06:39:00Z |
| format | Article |
| id | doaj.art-259d5b69d915496299baa617a10207fb |
| institution | Directory Open Access Journal |
| issn | 2765-8791 |
| language | English |
| last_indexed | 2024-04-11T06:39:00Z |
| publishDate | 2022-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Ultrafast Science |
| spelling | doaj.art-259d5b69d915496299baa617a10207fb2022-12-22T04:39:36ZengAmerican Association for the Advancement of Science (AAAS)Ultrafast Science2765-87912022-01-01202210.34133/2022/9834102Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV InterferometerMumta Hena Mustary0Liang Xu1Wanyang Wu2Nida Haram3Dane E. Laban4Han Xu5Feng He6R. T. Sang7Igor V. Litvinyuk8Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaKey Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Collaborative Innovation Center for IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, 200093 Shanghai, ChinaKey Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Collaborative Innovation Center for IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, ChinaCentre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaCentre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaCentre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaKey Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Collaborative Innovation Center for IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China; CAS Center for Excellence in Ultra-Intense Laser Science, Shanghai 201800, ChinaCentre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaCentre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, AustraliaHigh-harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in the amplitude and phase of high-harmonic generation (HHG) signals. However, measurement of the harmonic phase is a daunting task. Here, we present a precise measurement of HHG phase difference between two isotopes of molecular hydrogen using the advanced extreme-ultraviolet (XUV) Gouy phase interferometer. The measured phase difference is about 200 mrad, corresponding to ~3 attoseconds (1 as=10−18 s) time delay which is nearly independent of harmonic order. The measurements agree very well with numerical calculations of a four-dimensional time-dependent Schödinger equation. Numerical simulations also reveal the effects of molecular orientation and intramolecular two-center interference on the measured phase difference. This technique opens a new avenue for measuring the phase of harmonic emission for different atoms and molecules. Together with isomeric or isotopic comparisons, it also enables the observation of subtle effects of molecular structures and nuclear motion on electron dynamics in strong laser fields.http://dx.doi.org/10.34133/2022/9834102 |
| spellingShingle | Mumta Hena Mustary Liang Xu Wanyang Wu Nida Haram Dane E. Laban Han Xu Feng He R. T. Sang Igor V. Litvinyuk Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer Ultrafast Science |
| title | Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer |
| title_full | Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer |
| title_fullStr | Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer |
| title_full_unstemmed | Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer |
| title_short | Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer |
| title_sort | attosecond delays of high harmonic emissions from hydrogen isotopes measured by xuv interferometer |
| url | http://dx.doi.org/10.34133/2022/9834102 |
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