| ATOMIC AND MOLECULAR PHYSICS |
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Nonresonant Multiphoton Ionization of Stark Decelerated Molecules by Femtosecond Laser Pulses |
| Congsen Meng1*, Zhihui Lü1, Xiaowei Wang1, Dongwen Zhang1, Zengxiu Zhao1, and Jianmin Yuan1,2 |
1Department of Physics, National University of Defense Technology, Changsha 410073, China
2Department of Physics, Graduate School of China Academy of Engineering Physics, Beijing 100193, China
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| Cite this article: |
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Congsen Meng, Zhihui Lü, Xiaowei Wang et al 2022 Chin. Phys. Lett. 39 113701 |
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Abstract Nonresonant multiphoton ionization by femtosecond laser pulses can be applied to any molecule virtually, thereby greatly enhancing the scope of Stark decelerated molecules. For comparison, we detect decelerated and trapped ammonia molecules using two different schemes: (i) nonresonant multiphoton ionization using intense femtosecond (fs) pulses in the near infrared, and (ii) resonance-enhanced multiphoton ionization using nanosecond (ns) pulses from a tunable UV laser. The observed number of ions per shot for both schemes is similar. The fs laser detection scheme suffers from an increased background, which can be effectively eliminated by subsequent mass and velocity selection. To determine the detection volume of the ns laser detection scheme, we present measurements in which the decelerated ammonia molecules are bunched to a packet with a longitudinal spread well below $\sim$100 µm. It is concluded that the detection volume for the ns laser detection scheme is 1.5–2 times larger than that of the fs laser detection scheme.
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Received: 17 August 2022
Published: 09 October 2022
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| PACS: |
37.10.Pq
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(Trapping of molecules)
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37.10.Mn
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(Slowing and cooling of molecules)
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| [1] | van de Meerakker S Y T, Bethlem H L, Vanhaecke N, and Meijer G 2012 Chem. Rev. 112 4828 |
| [2] | Bethlem H L, Berden G, van Roij A J A, Crompvoets F M H, and Meijer G 2000 Phys. Rev. Lett. 84 5744 |
| [3] | Cheng C, van der Poel A P P, Jansen P, Quintero-Pérez M, Wall T E, Ubachs W, and Bethlem H L 2016 Phys. Rev. Lett. 117 253201 |
| [4] | Wang Q, Hou S, Xu L, and Yin J 2016 Phys. Chem. Chem. Phys. 18 5432 |
| [5] | Du M, Zhang D, and Ding D 2021 Chin. Phys. Lett. 38 123201 |
| [6] | de Jongh T, Besemer M, Quan S, Karman T, van der Avoird A, Groenenboom G C, and van der Meerakker S 2020 Science 368 626 |
| [7] | Brabec T and Krausz F 2000 Rev. Mod. Phys. 72 545 |
| [8] | Posthumus J 2004 Rep. Prog. Phys. 67 623 |
| [9] | Backus S, Durfee I C G, Murnane M M, and Kapteyn H C 1998 Rev. Sci. Instrum. 69 1207 |
| [10] | Corkum P B 1993 Phys. Rev. Lett. 71 1994 |
| [11] | Hankin S, Villeneuve D, Corkum P, and Rayner D 2001 Phys. Rev. A 64 013405 |
| [12] | Meng C, van der Poel A P P, Cheng C, and Bethlem H L 2015 Phys. Rev. A 92 023404 |
| [13] | Bethlem H L, Crompvoets F M H, Jongma R T, van de Meerakker S Y T, and Meijer G 2002 Phys. Rev. A 65 053416 |
| [14] | Ashfold M, Langford S, Morgan R, Orr-Ewing A, Western C, Scheper C, and De Lange C 1998 Eur. Phys. J. D 4 189 |
| [15] | Quintero-Pérez M, Wall T E, Hoekstra S, and Bethlem H L 2014 J. Mol. Spectrosc. 300 112 |
| [16] | Quintero-Pérez M, Jansen P, Wall T E, van den Berg J E, Hoekstra S, and Bethlem H L 2013 Phys. Rev. Lett. 110 133003 |
| [17] | Jansen P, Quintero-Pérez M, Wall T E, van den Berg J E, Hoekstra S, and Bethlem H L 2013 Phys. Rev. A 88 043424 |
| [18] | Osterwalder A, Meek S A, Hammer G, Haak H, and Meijer G 2010 Phys. Rev. A 81 051401 |
| [19] | Meek S A, Parsons M F, Heyne G, Platschkowski V, Haak H, Meijer G, and Osterwalder A 2011 Rev. Sci. Instrum. 82 093108 |
| [20] | Eppink A T and Parker D H 1997 Rev. Sci. Instrum. 68 3477 |
| [21] | Janssen M, Parker D H, Sitz G O, Stolte S, and Chandler D W 1991 J. Phys. Chem. 95 8007 |
| [22] | Quintero-Pérez M, Jansen P, and Bethlem H L 2012 Phys. Chem. Chem. Phys. 14 9630 |
| [23] | van Veldhoven J, Küpper J, Bethlem H L, Sartakov B, van Roij A J A, and Meijer G 2004 Eur. Phys. J. D 31 337 |
| [24] | Bethlem H L, Kajita M, Sartakov B, Meijer G, and Ubachs W 2008 Eur. Phys. J. Spec. Top. 163 55 |
| [25] | Crompvoets F M H, Jongma R T, Bethlem H L, van Roij A J A, and Meijer G 2002 Phys. Rev. Lett. 89 093004 |
| [26] | Heiner C E, Bethlem H L, and Meijer G 2006 Phys. Chem. Chem. Phys. 8 2666 |
| [27] | Witte S, Zinkstok R T, Wolf A, Hogervorst W, Ubachs W, and Eikema K S 2006 Opt. Express 14 8168 |
| [28] | van Veldhoven J, Bethlem H L, and Meijer G 2005 Phys. Rev. Lett. 94 083001 |
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