Circular Dichroism in Multiphoton Ionization of Resonantly Excited Helium Ions near Channel Closing
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909380175200256 |
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| author | Wagner, Rene Ilchen, Markus Douguet, Nicolas Schmidt, Philipp Wieland, Niclas Callegari, Carlo Delk, Zachary Demidovich, Alexander Di Fraia, Michele Hofbrucker, Jiri Manfredda, Michele Music, Valerija Plekan, Oksana Prince, Kevin C. Rivas, Daniel E. Zangrando, Marco Grum-Grzhimailo, Alexei N. Bartschat, Klaus Meyer, Michael |
| author_facet | Wagner, Rene Ilchen, Markus Douguet, Nicolas Schmidt, Philipp Wieland, Niclas Callegari, Carlo Delk, Zachary Demidovich, Alexander Di Fraia, Michele Hofbrucker, Jiri Manfredda, Michele Music, Valerija Plekan, Oksana Prince, Kevin C. Rivas, Daniel E. Zangrando, Marco Grum-Grzhimailo, Alexei N. Bartschat, Klaus Meyer, Michael |
| contents | The circular dichroism (CD) of photoelectrons generated by near-infrared (NIR) laser pulses using multiphoton ionization of excited He$^+$ ions in the 3p(m=+1) state. The ions were prepared by circularly polarized extreme ultraviolet (XUV) pulses. For circularly polarized NIR pulses co- and counter-rotating relative to the polarization of the XUV pulse, a complex variation of the CD is observed as a result of intensity- and polarization-dependent Freeman resonances, with and without additional dichroic AC-Stark shifts. The experimental results are compared with numerical solutions of the time-dependent Schrödinger equation to identify and interpret the pronounced variation of the experimentally observed CD. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_14227 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Circular Dichroism in Multiphoton Ionization of Resonantly Excited Helium Ions near Channel Closing Wagner, Rene Ilchen, Markus Douguet, Nicolas Schmidt, Philipp Wieland, Niclas Callegari, Carlo Delk, Zachary Demidovich, Alexander Di Fraia, Michele Hofbrucker, Jiri Manfredda, Michele Music, Valerija Plekan, Oksana Prince, Kevin C. Rivas, Daniel E. Zangrando, Marco Grum-Grzhimailo, Alexei N. Bartschat, Klaus Meyer, Michael Atomic Physics Quantum Physics The circular dichroism (CD) of photoelectrons generated by near-infrared (NIR) laser pulses using multiphoton ionization of excited He$^+$ ions in the 3p(m=+1) state. The ions were prepared by circularly polarized extreme ultraviolet (XUV) pulses. For circularly polarized NIR pulses co- and counter-rotating relative to the polarization of the XUV pulse, a complex variation of the CD is observed as a result of intensity- and polarization-dependent Freeman resonances, with and without additional dichroic AC-Stark shifts. The experimental results are compared with numerical solutions of the time-dependent Schrödinger equation to identify and interpret the pronounced variation of the experimentally observed CD. |
| title | Circular Dichroism in Multiphoton Ionization of Resonantly Excited Helium Ions near Channel Closing |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2407.14227 |