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Sun Z, Wang C, Zhao W, Yang C. Mapping of the light-induced conical intersections in the photoelectron spectra of K 2 molecules. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 207:348-353. [PMID: 30268902 DOI: 10.1016/j.saa.2018.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/31/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
In the strong field regime, exploring the physical nature of molecular dynamics is still a challenge due to the dramatic change of molecular potentials. Here, we perform a quantum wave packet study on the pump-probe ionization of K2 molecules and show how the light-induced conical intersections (LICIs) are imprinted into the molecular photoelectron spectra. We demonstrate that the energy and angular distributions of photoelectron spectra provide an accurate mapping of the electronic structure under the influence of the strong laser field. The determination of correct characterization of LICIs can help us to better explore alternative ways to control dynamics.
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Affiliation(s)
- Zhaopeng Sun
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China.
| | - Chunyang Wang
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Wenkai Zhao
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Chuanlu Yang
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China.
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3
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Hild MB, Dufour A, Achazi G, Patas A, Scheier P, Lindinger A. Selection of ionization paths of K2 on superfluid helium droplets by wave packet interference. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Guo W, Lu X, Wang X, Yao H. The effect of pump-2 laser on Autler-Townes splitting in photoelectron spectra of K2 molecule. Phys Chem Chem Phys 2014; 16:20755-62. [PMID: 25163761 DOI: 10.1039/c4cp02258k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We theoretically investigated Autler-Townes (AT) splitting in the photoelectron spectra of a four-level ladder K2 molecule driven by pump1-pump2-probe pulses by employing the time-dependent wave packet approach. The effect of pump-2 laser intensity and wavelength on AT splitting was studied for the first time. Triple splitting with asymmetric profiles arises because of the non-resonant excitation. The triple splitting transforms to double splitting when pump-2 detuning approaches ±1/2 times of pump-1 Rabi frequency. The splitting between two side band peaks in the triplet or doublet does not change with the pump-2 laser wavelength. The three peaks shift to a lower energy with a different shift as pump-2 wavelength increases. The magnitude of AT splitting increases with increasing pump-2 laser intensity. The asymptotic behavior of AT splitting with the pump-2 laser intensity are interesting at the threshold point of the near resonant region and far-off resonant region.
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Affiliation(s)
- Wei Guo
- School of Electric Engineering, University of South China, Hengyang 421001, P. R. China
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5
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YAO HONGBIN, LIN SHIYING, ZHENG YUJUN. NONADIABATIC EFFECTS IN FEMTOSECOND PHOTOIONIZATION OF NaI MOLECULE. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2012. [DOI: 10.1142/s0219633611006608] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this work, the nonadiabatic effects in the femtosecond photoionization of NaI molecule driven by pump and probe pulses are investigated theoretically using the accurate quantum wave packet method. The calculation with the inclusion of nonadiabatic coupling remarkably improves the agreement with experimental results of Jouvet et al. [J Phys Chen A101: 2555, 1997], indicating the importance of the nonadiabatic effect. Moreover, the dynamical evolutions of wave packets and their corresponding time-resolved photoelectron spectroscopy are presented both on the adiabatic and diabatic potentials. These comparisons contribute to further understanding of the influences of nonadiabatic effects in the femtosecond photoionization of NaI molecule.
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Affiliation(s)
- HONG-BIN YAO
- School of Physics, Shandong University, Jinan 250100, P. R. China
| | - SHI-YING LIN
- School of Physics, Shandong University, Jinan 250100, P. R. China
| | - YU-JUN ZHENG
- School of Physics, Shandong University, Jinan 250100, P. R. China
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Weise F, Achazi G, Lindinger A. Parametrically polarization shaped pulses guided via a hollow core photonic crystal fiber for coherent control. Phys Chem Chem Phys 2011; 13:8621-6. [PMID: 21479324 DOI: 10.1039/c0cp02263b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present ultrafast polarization pulse shaping through a micro structured hollow core photonic crystal fiber. The pulses are shaped in pulse sequences in which the energy, distance, phases, and chirps as well as the state of polarization of each individual sub-pulse can be independently controlled. The application of these pulses for coherent control is demonstrated for feedback loop optimization of the multi-photon ionization of potassium dimers. In a second experiment, this process is investigated by shaper-assisted pump-probe spectroscopy which is likewise performed with pulses that are transmitted through the fiber. Both techniques reveal the excitation pathway including the dynamics in the participating electronic states and expose the relevance of the polarization. These methods will be valuable for endoscopic applications.
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Affiliation(s)
- Fabian Weise
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany.
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7
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Yao H, Zheng Y. Quantum control of a molecular system in an intense field via the selective population of dressed states. Phys Chem Chem Phys 2011; 13:8900-7. [DOI: 10.1039/c1cp20149b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Plenge J, Wirsing A, Raschpichler C, Wassermann B, Rühl E. Control of coherent excitation of neon in the extreme ultraviolet regime. Faraday Discuss 2011; 153:361-73; discussion 395-413. [PMID: 22452090 DOI: 10.1039/c1fd00032b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coherent excitation of a superposition of Rydberg states in neon by the 13th harmonic of an intense 804 nm pulse and the formation of a wave packet is reported. Pump-probe experiments are performed, where the 3d-manifold of the 2p6-->2p5 (2P3/2) 3d [1/2]1- and 2p6-->2p5 (2P3/2) 3d [3/2]1-transitions are excited by an extreme ultraviolet (XUV) radiation pulse, which is centered at 20.05 eV photon energy. The temporal evolution of the excited state population is probed by ionization with a time-delayed 804 nm pulse. Control of coherent transient excitation and wave packet dynamics in the XUV-regime is demonstrated, where the spectral phase of the 13th harmonic is used as a control parameter. Modulation of the phase is achieved by propagation of the XUV-pulse through neon of variable gas density. The experimental results indicate that phase-shaped high-order harmonics can be used to control fundamental coherent excitation processes in the XUV-regime.
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Affiliation(s)
- Jürgen Plenge
- Physikalische und Theoretische Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
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9
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Dissipative vibrational wave packet dynamics of alkali dimers attached to helium nanodroplets. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.03.060] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Torres EA, Lerch EBW, Dai X, Gilb S, Leone SR. N-level Li2 multiphoton rotational wave packets: alignment effects in resonant multiphoton coherent excitation. J Chem Phys 2007; 126:044310. [PMID: 17286473 DOI: 10.1063/1.2430525] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using one color ultrafast pump-probe spectroscopy, the authors create N-level multiphoton rotational wave packets via resonant optical pumping between the A((1)Sigma(u) (+)) and E((1)Sigma(g) (+)) electronically bound states of Li(2) from a single optically state-selected rovibrational state |nu(A)=11, j(A)=28>. The authors find that excitation with a single amplitude shaped femtosecond pulse allows the direct observation of up to a six photon absorption, which generates a coherent superposition of 13 rotational states. The multilevel rotational wave packet is theoretically treated with the multipole moment formalism in order to characterize the experimentally observed time-dependent alignment. In particular, the authors find that the magnetic state distributions measured among coherently excited rotational states generated by the resonant multiphoton pumping reduces the measured coherence amplitudes by as much as 40%.
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Affiliation(s)
- Elva A Torres
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720-1460, USA
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Katsuki H, Chiba H, Girard B, Meier C, Ohmori K. Visualizing Picometric Quantum Ripples of Ultrafast Wave-Packet Interference. Science 2006; 311:1589-92. [PMID: 16543456 DOI: 10.1126/science.1121240] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Interference fringes in vibrating molecules are a signature of quantum mechanics, but are often so short-lived and closely spaced that they elude visualization. We have experimentally visualized dynamical quantum interferences, which appear and disappear in less than 100 femtoseconds in the iodine molecule synchronously with the periodic crossing of two counterpropagating nuclear wave packets. The obtained images have picometer and femtosecond spatiotemporal resolution, representing a detailed picture of the quantum interference.
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Affiliation(s)
- Hiroyuki Katsuki
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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Wollenhaupt M, Engel V, Baumert T. FEMTOSECOND LASER PHOTOELECTRON SPECTROSCOPY ON ATOMS AND SMALL MOLECULES: Prototype Studies in Quantum Control. Annu Rev Phys Chem 2005; 56:25-56. [PMID: 15796695 DOI: 10.1146/annurev.physchem.56.092503.141315] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
▪ Abstract We review prototype studies in the area of quantum control with femtosecond lasers. We restrict this discussion to atoms and diatomics under gas-phase collision-free conditions to allow for a comparison between theory and experiment. Both the perturbative regime and the nonperturbative regime of the light-matter interaction are addressed. To that end, atomic/molecular beam techniques are combined together with femtosecond laser techniques and energy-resolved photoelectron spectroscopy and ion detection. Highly detailed information on the laser-induced quantum dynamics is extracted with the help of kinetic energy-resolved photoelectron spectroscopy.
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Affiliation(s)
- M Wollenhaupt
- Institut für Physik, Universität Kassel, D-34132 Kassel, Germany.
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Bonacić-Koutecký V, Mitrić R. Theoretical Exploration of Ultrafast Dynamics in Atomic Clusters: Analysis and Control. Chem Rev 2004; 105:11-66. [PMID: 15720151 DOI: 10.1021/cr0206925] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vlasta Bonacić-Koutecký
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany.
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Meier C, Beswick JA. Femtosecond pump-probe spectroscopy of I2 in a dense rare gas environment: A mixed quantum/classical study of vibrational decoherence. J Chem Phys 2004; 121:4550-8. [PMID: 15332885 DOI: 10.1063/1.1774159] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The process of decoherence of vibrational states of I2 in a dense helium environment is studied theoretically using the mixed quantum/classical method based on the Bohmian formulation of quantum mechanics [E. Gindensperger, C. Meier, and J. A. Beswick, J. Chem. Phys. 113, 9369 (2000)]. Specifically, the revival of vibrational wave packets is a quantum phenomena which depends sensitively on the coherence between the vibrational states excited by an ultrafast laser pulse. Its detection by a pump-probe setup as a function of rare gas pressure forms a very accurate way of detecting vibrational dephasing. Vibrational revivals of I2 in high pressure rare gas environments have been observed experimentally, and the very good agreement with the simulated spectra confirms that the method can accurately describe decoherence processes of quantum systems in interaction with an environment.
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Affiliation(s)
- C Meier
- Laboratoire Collisions, Agregats et Reactivite, UMR 5589, IRSAMC, Universite Paul Sabatier, 31062 Toulouse, France
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Lohmüller T, Engel V, Beswick JA, Meier C. Fractional revivals in the rovibrational motion of I2. J Chem Phys 2004; 120:10442-9. [PMID: 15268072 DOI: 10.1063/1.1711809] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Motivated by pump-probe experiments of I(2) in a room-temperature sample, the detection of fractional revivals is investigated using full-dimensional quantum wave packet calculations. It is shown that the structures observed in the pump-probe signal depend sensitively on the probe parameters employed and that the observed signal reflects a particular phase effect between fractional revivals.
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Affiliation(s)
- T Lohmüller
- Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Brixner T, Krampert G, Pfeifer T, Selle R, Gerber G, Wollenhaupt M, Graefe O, Horn C, Liese D, Baumert T. Quantum control by ultrafast polarization shaping. PHYSICAL REVIEW LETTERS 2004; 92:208301. [PMID: 15169385 DOI: 10.1103/physrevlett.92.208301] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2004] [Indexed: 05/24/2023]
Abstract
We demonstrate that the use of time-dependent light polarization opens a new level of control over quantum systems. With potassium dimer molecules from a supersonic molecular beam, we show that a polarization-shaped laser pulse increases the ionization yield beyond that obtained with an optimally shaped linearly polarized laser pulse. This is due to the different multiphoton ionization pathways in K2 involving dipole transitions which favor different polarization directions of the exciting laser field. This experiment is a qualitative extension of quantum control mechanisms which opens up new directions giving access to the three-dimensional temporal response of molecular systems.
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Affiliation(s)
- T Brixner
- Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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Schäfer-Bung B, Mitrić R, Bonačić-Koutecký V, Bartelt A, Lupulescu C, Lindinger A, Vajda Š, Weber SM, Wöste L. Optimal Control of Ionization Processes in NaK: Comparison between Theory and Experiment. J Phys Chem A 2004. [DOI: 10.1021/jp049153p] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Affiliation(s)
- T E Dermota
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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Wollenhaupt M, Assion A, Graefe O, Liese D, Sarpe-Tudoran C, Winter M, Baumert T. Changes of the electronic structure along the internuclear coordinate studied by ultrafast photoelectron spectroscopy: the 21Σu+ Na2 double-minimum state. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00994-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Stauffer HU, Ballard JB, Amitay Z, Leone SR. Simultaneous phase control of Li2 wave packets in two electronic states. J Chem Phys 2002. [DOI: 10.1063/1.1427708] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Andersson R, Kadi M, Davidsson J, Hansson T. Photoionisation of molecular wavepackets – the NaK(C1Σ+) case. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(01)01411-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Pesce L, Amitay Z, Uberna R, Leone SR, Ratner M, Kosloff R. Quantum dynamics simulation of the ultrafast photoionization of Li2. J Chem Phys 2001. [DOI: 10.1063/1.1333004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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24
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Zhang B, Berg LE, Hansson T. Wavepacket dynamics and predissociation of the D1Πu state of Rb2. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00730-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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