New Method for Measuring Angle-Resolved Phases in Photoemission
Quantum mechanically, photoionization can be fully described by the complex photoionization amplitudes that describe the transition between the ground state and the continuum state. Knowledge of the value of the phase of these amplitudes has been a central interest in photoionization studies and new...
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American Physical Society
2020
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oai:doaj.org-article:4cf782f8e254437f847e8aca791ba5172021-12-02T11:59:17ZNew Method for Measuring Angle-Resolved Phases in Photoemission10.1103/PhysRevX.10.0310702160-3308https://doaj.org/article/4cf782f8e254437f847e8aca791ba5172020-09-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.10.031070http://doi.org/10.1103/PhysRevX.10.031070https://doaj.org/toc/2160-3308Quantum mechanically, photoionization can be fully described by the complex photoionization amplitudes that describe the transition between the ground state and the continuum state. Knowledge of the value of the phase of these amplitudes has been a central interest in photoionization studies and newly developing attosecond science, since the phase can reveal important information about phenomena such as electron correlation. We present a new attosecond-precision interferometric method of angle-resolved measurement for the phase of the photoionization amplitudes, using two phase-locked extreme ultraviolet pulses of frequency ω and 2ω, from a free-electron laser. Phase differences Δη[over ˜] between one- and two-photon ionization channels, averaged over multiple wave packets, are extracted for neon 2p electrons as a function of the emission angle at photoelectron energies 7.9, 10.2, and 16.6 eV. Δη[over ˜] is nearly constant for emission parallel to the electric vector but increases at 10.2 eV for emission perpendicular to the electric vector. We model our observations with both perturbation and ab initio theory and find excellent agreement. In the existing method for attosecond measurement, reconstruction of attosecond beating by interference of two-photon transitions (RABBITT), a phase difference between two-photon pathways involving absorption and emission of an infrared photon is extracted. Our method can be used for extraction of a phase difference between single-photon and two-photon pathways and provides a new tool for attosecond science, which is complementary to RABBITT.Daehyun YouKiyoshi UedaElena V. GryzlovaAlexei N. Grum-GrzhimailoMaria M. PopovaEkaterina I. StaroselskayaOyunbileg TugsYuki OrimoTakeshi SatoKenichi L. IshikawaPaolo Antonio CarpeggianiTamás CsizmadiaMiklós FüleGiuseppe SansonePraveen Kumar MarojuAlessandro D’EliaTommaso MazzaMichael MeyerCarlo CallegariMichele Di FraiaOksana PlekanRobert RichterLuca GiannessiEnrico AllariaGiovanni De NinnoMauro TrovòLaura BadanoBruno DiviaccoGiulio GaioDavid GauthierNajmeh MirianGiuseppe PencoPrimož Rebernik RibičSimone SpampinatiCarlo SpezzaniKevin C. PrinceAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 10, Iss 3, p 031070 (2020) |
| institution |
DOAJ |
| collection |
DOAJ |
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EN |
| topic |
Physics QC1-999 |
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Physics QC1-999 Daehyun You Kiyoshi Ueda Elena V. Gryzlova Alexei N. Grum-Grzhimailo Maria M. Popova Ekaterina I. Staroselskaya Oyunbileg Tugs Yuki Orimo Takeshi Sato Kenichi L. Ishikawa Paolo Antonio Carpeggiani Tamás Csizmadia Miklós Füle Giuseppe Sansone Praveen Kumar Maroju Alessandro D’Elia Tommaso Mazza Michael Meyer Carlo Callegari Michele Di Fraia Oksana Plekan Robert Richter Luca Giannessi Enrico Allaria Giovanni De Ninno Mauro Trovò Laura Badano Bruno Diviacco Giulio Gaio David Gauthier Najmeh Mirian Giuseppe Penco Primož Rebernik Ribič Simone Spampinati Carlo Spezzani Kevin C. Prince New Method for Measuring Angle-Resolved Phases in Photoemission |
| description |
Quantum mechanically, photoionization can be fully described by the complex photoionization amplitudes that describe the transition between the ground state and the continuum state. Knowledge of the value of the phase of these amplitudes has been a central interest in photoionization studies and newly developing attosecond science, since the phase can reveal important information about phenomena such as electron correlation. We present a new attosecond-precision interferometric method of angle-resolved measurement for the phase of the photoionization amplitudes, using two phase-locked extreme ultraviolet pulses of frequency ω and 2ω, from a free-electron laser. Phase differences Δη[over ˜] between one- and two-photon ionization channels, averaged over multiple wave packets, are extracted for neon 2p electrons as a function of the emission angle at photoelectron energies 7.9, 10.2, and 16.6 eV. Δη[over ˜] is nearly constant for emission parallel to the electric vector but increases at 10.2 eV for emission perpendicular to the electric vector. We model our observations with both perturbation and ab initio theory and find excellent agreement. In the existing method for attosecond measurement, reconstruction of attosecond beating by interference of two-photon transitions (RABBITT), a phase difference between two-photon pathways involving absorption and emission of an infrared photon is extracted. Our method can be used for extraction of a phase difference between single-photon and two-photon pathways and provides a new tool for attosecond science, which is complementary to RABBITT. |
| format |
article |
| author |
Daehyun You Kiyoshi Ueda Elena V. Gryzlova Alexei N. Grum-Grzhimailo Maria M. Popova Ekaterina I. Staroselskaya Oyunbileg Tugs Yuki Orimo Takeshi Sato Kenichi L. Ishikawa Paolo Antonio Carpeggiani Tamás Csizmadia Miklós Füle Giuseppe Sansone Praveen Kumar Maroju Alessandro D’Elia Tommaso Mazza Michael Meyer Carlo Callegari Michele Di Fraia Oksana Plekan Robert Richter Luca Giannessi Enrico Allaria Giovanni De Ninno Mauro Trovò Laura Badano Bruno Diviacco Giulio Gaio David Gauthier Najmeh Mirian Giuseppe Penco Primož Rebernik Ribič Simone Spampinati Carlo Spezzani Kevin C. Prince |
| author_facet |
Daehyun You Kiyoshi Ueda Elena V. Gryzlova Alexei N. Grum-Grzhimailo Maria M. Popova Ekaterina I. Staroselskaya Oyunbileg Tugs Yuki Orimo Takeshi Sato Kenichi L. Ishikawa Paolo Antonio Carpeggiani Tamás Csizmadia Miklós Füle Giuseppe Sansone Praveen Kumar Maroju Alessandro D’Elia Tommaso Mazza Michael Meyer Carlo Callegari Michele Di Fraia Oksana Plekan Robert Richter Luca Giannessi Enrico Allaria Giovanni De Ninno Mauro Trovò Laura Badano Bruno Diviacco Giulio Gaio David Gauthier Najmeh Mirian Giuseppe Penco Primož Rebernik Ribič Simone Spampinati Carlo Spezzani Kevin C. Prince |
| author_sort |
Daehyun You |
| title |
New Method for Measuring Angle-Resolved Phases in Photoemission |
| title_short |
New Method for Measuring Angle-Resolved Phases in Photoemission |
| title_full |
New Method for Measuring Angle-Resolved Phases in Photoemission |
| title_fullStr |
New Method for Measuring Angle-Resolved Phases in Photoemission |
| title_full_unstemmed |
New Method for Measuring Angle-Resolved Phases in Photoemission |
| title_sort |
new method for measuring angle-resolved phases in photoemission |
| publisher |
American Physical Society |
| publishDate |
2020 |
| url |
https://doaj.org/article/4cf782f8e254437f847e8aca791ba517 |
| work_keys_str_mv |
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| _version_ |
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