Journal
NEW JOURNAL OF PHYSICS
Volume 21, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab520d
Keywords
laser enabled Auger decay; free-electron laser; neon
Categories
Funding
- JSPS KAKENHI [JP19J12870]
- Tohoku University Institute for Promoting Graduate Degree Programs, Division for Interdisciplinary Advanced Research and Education
- CSE program of the ARCHER U.K.
- EPSRC/DSTL MURI Grant [EP/N018680/1]
- Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT)
- IMRAMprogram of Tohoku University
- Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials program
- Cooperative Research Program of the 'Network Joint Research Center for Materials and Devices (Japan)'
- MEXT [16H03881, 19H00869]
- Center of Innovation Program from the Japan Science and Technology Agency, JST, CREST [JPMJCR15N1]
- JST, MEXTQuantum Leap Flagship Program (MEXTQ-LEAP) Grant [JPMXS0118067246]
- Japan-Hungary Research Cooperative Program, JSPS
- Japan-Hungary Research Cooperative Program, HAS
- Deutsche Forschungsgemeinschaft (DFG) [SFB925/1]
- Alexander von Humboldt Foundation (Project Tirinto)
- Italian Ministry of Research Project FIRB [RBID08CRXK, PRIN 2010 ERFKXL 006]
- bilateral project CNRJSPS Ultrafast science with extreme ultraviolet Free Electron Lasers
- European Union Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant [641789]
- Grants-in-Aid for Scientific Research [19H00869, 16H03881] Funding Source: KAKEN
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Single-photon laser enabled Auger decay (spLEAD) is an electronic de-excitation process which was recently predicted and observed in Ne. We have investigated it using bichromatic phase-locked free electron laser radiation and extensive angle-resolved photoelectron measurements, supported by a detailed theoretical model. We first used separately the fundamental wavelength resonant with the Ne+ 2s?2p transition, 46.17 nm, and its second harmonic, 23.08 nm, then their phase-locked bichromatic combination. In the latter case the phase difference between the two wavelengths was scanned, and interference effects were observed, confirming that the spLEAD process was occurring. The detailed theoretical model we developed qualitatively predicts all observations: branching ratios between the final Auger states, their amplitudes of oscillation as a function of phase, the phase lag between the oscillations of different final states, and partial cancellation of the oscillations under certain conditions.
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