High resolution multiphoton spectroscopy by a tunable free-electron-laser light.
(2014) In Physical Review Letters 113(19).- Abstract
- Seeded free electron lasers theoretically have the intensity, tunability, and resolution required for multiphoton spectroscopy of atomic and molecular species. Using the seeded free electron laser FERMI and a novel detection scheme, we have revealed the two-photon excitation spectra of dipole-forbidden doubly excited states in helium. The spectral profiles of the lowest (-1,0)^{+1} ^{1}S^{e} and (0,1)^{0} ^{1}D^{e} resonances display energy shifts in the meV range that depend on the pulse intensity. The results are explained by an effective two-level model based on calculated Rabi frequencies and decay rates.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4816312
- author
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 113
- issue
- 19
- article number
- 193201
- publisher
- American Physical Society
- external identifiers
-
- pmid:25415905
- wos:000345358100006
- scopus:84910071092
- pmid:25415905
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.113.193201
- language
- English
- LU publication?
- yes
- id
- 47e43639-bc4d-4d7a-91cf-7c613f9204d4 (old id 4816312)
- date added to LUP
- 2016-04-01 10:41:58
- date last changed
- 2022-04-28 00:33:22
@article{47e43639-bc4d-4d7a-91cf-7c613f9204d4, abstract = {{Seeded free electron lasers theoretically have the intensity, tunability, and resolution required for multiphoton spectroscopy of atomic and molecular species. Using the seeded free electron laser FERMI and a novel detection scheme, we have revealed the two-photon excitation spectra of dipole-forbidden doubly excited states in helium. The spectral profiles of the lowest (-1,0)^{+1} ^{1}S^{e} and (0,1)^{0} ^{1}D^{e} resonances display energy shifts in the meV range that depend on the pulse intensity. The results are explained by an effective two-level model based on calculated Rabi frequencies and decay rates.}}, author = {{Zitnik, M and Mihelič, A and Bučar, K and Kavčič, M and Rubensson, J-E and Svanquist, M and Söderström, J and Feifel, R and Såthe, Conny and Ovcharenko, Y and Lyamayev, V and Mazza, T and Meyer, M and Simon, M and Journel, L and Lüning, J and Plekan, O and Coreno, M and Devetta, M and Di Fraia, M and Finetti, P and Richter, R and Grazioli, C and Prince, K C and Callegari, C}}, issn = {{1079-7114}}, language = {{eng}}, number = {{19}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{High resolution multiphoton spectroscopy by a tunable free-electron-laser light.}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.113.193201}}, doi = {{10.1103/PhysRevLett.113.193201}}, volume = {{113}}, year = {{2014}}, }