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Larsson HR, Tannor DJ. Control of concerted back-to-back double ionization dynamics in helium. J Chem Phys 2021; 155:144105. [PMID: 34654299 DOI: 10.1063/5.0063056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Double ionization (DI) is a fundamental process that despite its apparent simplicity provides rich opportunities for probing and controlling the electronic motion. Even for the simplest multielectron atom, helium, new DI mechanisms are still being found. To first order in the field strength, a strong external field doubly ionizes the electrons in helium such that they are ejected into the same direction (front-to-back motion). The ejection into opposite directions (back-to-back motion) cannot be described to first order, making it a challenging target for control. Here, we address this challenge and optimize the field with the objective of back-to-back double ionization using a (1 + 1)-dimensional model. The optimization is performed using four different control procedures: (1) short-time control, (2) derivative-free optimization of basis expansions of the field, (3) the Krotov method, and (4) control of the classical equations of motion. All four procedures lead to fields with dominant back-to-back motion. All the fields obtained exploit essentially the same two-step mechanism leading to back-to-back motion: first, the electrons are displaced by the field into the same direction. Second, after the field turns off, the nuclear attraction and the electron-electron repulsion combine to generate the final motion into opposite directions for each electron. By performing quasi-classical calculations, we confirm that this mechanism is essentially classical.
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Affiliation(s)
- Henrik R Larsson
- Institut für Physikalische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098 Kiel, Germany
| | - David J Tannor
- Department of Chemical Physics, Weizmann Institute of Science, 76100 Rehovot, Israel
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2
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Yang L, Reimers JR, Kobayashi R, Hush NS. Competition between charge migration and charge transfer induced by nuclear motion following core ionization: Model systems and application to Li 2. J Chem Phys 2019; 151:124108. [PMID: 31575213 DOI: 10.1063/1.5117246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Attosecond and femtosecond spectroscopies present opportunities for the control of chemical reaction dynamics and products, as well as for quantum information processing; we address the somewhat unique situation of core-ionization spectroscopy which, for dimeric chromophores, leads to strong valence charge localization and hence tightly paired potential-energy surfaces of very similar shape. Application is made to the quantum dynamics of core-ionized Li2 +. This system is chosen as Li2 is the simplest stable molecule facilitating both core ionization and valence ionization. First, the quantum dynamics of some model surfaces are considered, with the surprising result that subtle differences in shape between core-ionization paired surfaces can lead to dramatic differences in the interplay between electronic charge migration and charge transfer induced by nuclear motion. Then, equation-of-motion coupled-cluster calculations are applied to determine potential-energy surfaces for 8 core-excited state pairs, calculations believed to be the first of their type for other than the lowest-energy core-ionized molecular pair. While known results for the lowest-energy pair suggest that Li2 + is unsuitable for studying charge migration, higher-energy pairs are predicted to yield results showing competition between charge migration and charge transfer. Central is a focus on the application of Hush's 1975 theory for core-ionized X-ray photoelectron spectroscopy to understand the shapes of the potential-energy surfaces and hence predict key features of charge migration.
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Affiliation(s)
- Likun Yang
- International Centre for Quantum and Molecular Structures and Department of Physics, Shanghai University, Shanghai 200444, China
| | - Jeffrey R Reimers
- School of Mathematical and Physical Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Rika Kobayashi
- International Centre for Quantum and Molecular Structures and Department of Physics, Shanghai University, Shanghai 200444, China
| | - Noel S Hush
- School of Molecular Biosciences, The University of Sydney, Sydney, NSW 2006, Australia
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3
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Smith BD, Spears KG, Sension RJ. Probing the Biexponential Dynamics of Ring-Opening in 7-Dehydrocholesterol. J Phys Chem A 2016; 120:6575-81. [DOI: 10.1021/acs.jpca.6b06967] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Broc D. Smith
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
| | - Kenneth G. Spears
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
| | - Roseanne J. Sension
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
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4
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Roslund J, Roth M, Guyon L, Boutou V, Courvoisier F, Wolf JP, Rabitz H. Resolution of strongly competitive product channels with optimal dynamic discrimination: Application to flavins. J Chem Phys 2011; 134:034511. [DOI: 10.1063/1.3518751] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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5
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Carroll EC, White JL, Florean AC, Bucksbaum PH, Sension RJ. Multiphoton Control of the 1,3-Cyclohexadiene Ring-Opening Reaction in the Presence of Competing Solvent Reactions. J Phys Chem A 2008; 112:6811-22. [DOI: 10.1021/jp8013404] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Elizabeth C. Carroll
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - James L. White
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Andrei C. Florean
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Philip H. Bucksbaum
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Roseanne J. Sension
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
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Abstract
Coherent manipulations of atoms using laser lightThe internal structure of a particle - an atom or other quantum system in which the excitation energies are discrete - undergoes change when exposed to pulses of near-resonant laser light. This tutorial review presents basic concepts of quantum states, of laser radiation and of the Hilbert-space statevector that provides the theoretical portrait of probability amplitudes - the tools for quantifying quantum properties not only of individual atoms and molecules but also of artificial atoms and other quantum systems. It discusses the equations of motion that describe the laser-induced changes (coherent excitation), and gives examples of laser-pulse effects, with particular emphasis on two-state and three-state adiabatic time evolution within the rotating-wave approximation. It provides pictorial descriptions of excitation based on the Bloch equations that allow visualization of two-state excitation as motion of a three-dimensional vector (the Bloch vector). Other visualization techniques allow portrayal of more elaborate systems, particularly the Hilbert-space motion of adiabatic states subject to various pulse sequences. Various more general multilevel systems receive treatment that includes degeneracies, chains and loop linkages. The concluding sections discuss techniques for creating arbitrary pre-assigned quantum states, for manipulating them into alternative coherent superpositions and for analyzing an unknown superposition. Appendices review some basic mathematical concepts and provide further details of the theoretical formalism, including photons, pulse propagation, statistical averages, analytic solutions to the equations of motion, exact solutions of periodic Hamiltonians, and population-trapping "dark" states.
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7
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Choi H, Son WJ, Shin S, Chang BY, Sola IR. Selective photodissociation in diatomic molecules by dynamical Stark-shift control. J Chem Phys 2008; 128:104315. [DOI: 10.1063/1.2838911] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Symmetry of nonlinear optical response to time inversion of shaped femtosecond pulses as a clock of ultrafast dynamics. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.04.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Gühr M, Bargheer M, Fushitani M, Kiljunen T, Schwentner N. Ultrafast dynamics of halogens in rare gas solids. Phys Chem Chem Phys 2007; 9:779-801. [PMID: 17287873 DOI: 10.1039/b609058n] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We perform time resolved pump-probe spectroscopy on small halogen molecules ClF, Cl2, Br2, and I2 embedded in rare gas solids (RGS). We find that dissociation, angular depolarization, and the decoherence of the molecule is strongly influenced by the cage structure. The well ordered crystalline environment facilitates the modelling of the experimental angular distribution of the molecular axis after the collision with the rare gas cage. The observation of many subsequent vibrational wave packet oscillations allows the construction of anharmonic potentials and indicate a long vibrational coherence time. We control the vibrational wave packet revivals, thereby gaining information about the vibrational decoherence. The coherence times are remarkable larger when compared to the liquid or high pressure gas phase. This fact is attributed to the highly symmetric molecular environment of the RGS. The decoherence and energy relaxation data agree well with a perturbative model for moderate vibrational excitation and follow a classical model in the strong excitation limit. Furthermore, a wave packet interferometry scheme is applied to deduce electronic coherence times. The positions of those cage atoms, excited by the molecular electronic transitions are modulated by long living coherent phonons of the RGS, which we can probe via the molecular charge transfer states.
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Affiliation(s)
- M Gühr
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195, Berlin, Germany
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11
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Chang BY, Sola IR. Pump-dump iterative squeezing of vibrational wave packets. J Chem Phys 2005; 123:244101. [PMID: 16396528 DOI: 10.1063/1.2139091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The free motion of a nonstationary vibrational wave packet in an electronic potential is a source of interesting quantum properties. In this work we propose an iterative scheme that allows continuous stretching and squeezing of a wave packet in the ground or in an excited electronic state, by switching the wave function between both potentials with pi pulses at certain times. Using a simple model of displaced harmonic oscillators and delta pulses, we derive the analytical solution and the conditions for its possible implementation and optimization in different molecules and electronic states. We show that the main constraining parameter is the pulse bandwidth. Although in principle the degree of squeezing (or stretching) is not bounded, the physical resources increase quadratically with the number of iterations, while the achieved squeezing only increases linearly.
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Affiliation(s)
- Bo Y Chang
- College of Environmental Science and Applied Chemistry (BK21), Kyung-Hee University, Gyeonggi-do 449-701, Republic of Korea
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Chang BY, Lee S, Sola IR, Santamaría J. Adiabatic squeezing of molecular wave packets by laser pulses. J Chem Phys 2005; 122:204316. [PMID: 15945733 DOI: 10.1063/1.1904593] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Strong pulse sequences can be used to control the position and width of the molecular wave packet. In this paper we propose a new scheme to maximally compress the wave packet in a quasistatic way by freezing it at a peculiar adiabatic potential shaped by two laser pulses. The dynamic principles of the scheme and the characteristic effect of the different control parameters are presented and analyzed. We use two different molecular models, electronic potentials modeled by harmonic oscillators, with the same force constants, and the Na(2) dimer, to show the typical yield that can be obtained in compressing the initial (minimum width) molecular wave function.
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Affiliation(s)
- Bo Y Chang
- College of Environmental Science and Applied Chemistry, Kyung-Hee University, Gyeonggi-do 449-701, Republic of Korea
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13
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Yang S, Cao J, Field RW. A semiclassical study of wave packet dynamics in anharmonic potentials. J Chem Phys 2004; 121:6599-607. [PMID: 15473714 DOI: 10.1063/1.1791131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Classical and semiclassical methods are developed to calculate and invert the wave packet motion measured in pump-probe experiments. With classical propagation of the Wigner distribution of the initial wave packet created by the pump pulse, we predict the approximate probe signal with slightly displaced recurrence peaks, and derive a set of first-order canonical perturbation expressions to relate the temporal features of the signal to the characteristics of the potential surface. A reduced dynamics scheme based on the Gaussian assumption leads to the correct center of mass motion but does not describe the evolution of the shape of the wave packet accurately. To incorporate the quantum interference into classical trajectories, we propose a final-value representation semiclassical method, specifically designed for the purpose of computing pump-probe signals, and demonstrate its efficiency and accuracy with a Morse oscillator and two kinetically coupled Morse oscillators. For the case of one-color pump probe, a simple phase-space quantization scheme is devised to reproduce the temporal profile at the left-turning point without actual wave packet propagation, revealing a quantum mechanical perspective of the nearly classical pump-probe signal.
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Affiliation(s)
- Shilong Yang
- Department of Chemistry, Massachusetts Institute of Technology Cambridge, Massachusetts 02139, USA
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14
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Manescu C, Krause JL, Møller KB, Henriksen NE. Suppressing the Spreading of Continuum Wave Packets via Chirped Laser Pulses. J Phys Chem A 2004. [DOI: 10.1021/jp049077q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corneliu Manescu
- Quantum Theory Project, University of Florida, P.O. Box 118435, Gainesville, Florida 32611-8435, and Department of Chemistry, Building 207, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Jeffrey L. Krause
- Quantum Theory Project, University of Florida, P.O. Box 118435, Gainesville, Florida 32611-8435, and Department of Chemistry, Building 207, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Klaus B. Møller
- Quantum Theory Project, University of Florida, P.O. Box 118435, Gainesville, Florida 32611-8435, and Department of Chemistry, Building 207, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Niels E. Henriksen
- Quantum Theory Project, University of Florida, P.O. Box 118435, Gainesville, Florida 32611-8435, and Department of Chemistry, Building 207, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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15
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Dantus M, Lozovoy VV. Experimental Coherent Laser Control of Physicochemical Processes. Chem Rev 2004; 104:1813-59. [PMID: 15080713 DOI: 10.1021/cr020668r] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marcos Dantus
- Department of Chemistry and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
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16
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Flores SC, Batista VS. Model Study of Coherent-Control of the Femtosecond Primary Event of Vision. J Phys Chem B 2004. [DOI: 10.1021/jp0370526] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Samuel C. Flores
- Department of Chemistry, Yale University, PO Box 208107, New Haven, Connecticut 06520-8107
| | - Victor S. Batista
- Department of Chemistry, Yale University, PO Box 208107, New Haven, Connecticut 06520-8107
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17
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Gühr M, Ibrahim H, Schwentner N. Controlling vibrational wave packet revivals in condensed phase: Dispersion and coherence for Br2in solid Ar. Phys Chem Chem Phys 2004. [DOI: 10.1039/b413635g] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Lohmüller T, Erdmann M, Engel V. Chirped pulse ionization: bondlength dynamics and interference effects. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00593-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Lee SH, Jung KH, Sung JH, Hong KH, Nam CH. Adaptive quantum control of DCM fluorescence in the liquid phase. J Chem Phys 2002. [DOI: 10.1063/1.1519000] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Král P, Amitay Z, Shapiro M. Analytic solution for the nondegenerate quantum control problem. PHYSICAL REVIEW LETTERS 2002; 89:063002. [PMID: 12190580 DOI: 10.1103/physrevlett.89.063002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2002] [Indexed: 05/23/2023]
Abstract
We present an analytic solution for the nondegenerate quantum control problem, i.e., the transfer of a deliberate amount of population, 0%-100%, between arbitrary initial Psi(t)> and final Psi'(t)> states, which can be expanded in terms of nondegenerate energy eigenstates k>. The solution constitutes a robust two-photon multicomponent adiabatic passage, via an intermediate eigenstate 0>, which relies on three types of "null states."
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Affiliation(s)
- Petr Král
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
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21
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22
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Duarte-Zamorano RP, Romero-Rochı́n V. Analysis on the Cina–Harris proposal for the preparation and detection of chiral superposition states. J Chem Phys 2001. [DOI: 10.1063/1.1370069] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Amitay Z, Ballard JB, Stauffer HU, Leone SR. Phase-tailoring molecular wave packets to time shift their dynamics. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00217-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Shen Z, Boustani I, Erdmann M, Engel V. Characterization of nuclear wave packets prepared by chirped femtosecond pulses using time-resolved photoelectron spectroscopy. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00362-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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26
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Guiang CS, Wyatt RE. Quantum control of I2 wave packet localization in solid argon matrix. J Chem Phys 2000. [DOI: 10.1063/1.480935] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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27
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Albrecht AW, Hybl JD, Gallagher Faeder SM, Jonas DM. Experimental distinction between phase shifts and time delays: Implications for femtosecond spectroscopy and coherent control of chemical reactions. J Chem Phys 1999. [DOI: 10.1063/1.480457] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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28
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Bargheer M, Dietrich P, Donovang K, Schwentner N. Extraction of potentials and dynamics from condensed phase pump–probe spectra: Application to I2 in Kr matrices. J Chem Phys 1999. [DOI: 10.1063/1.480196] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Karmacharya R, Gross P, Schwartz SD. The effect of coupled nonreactive modes on laser control of quantum wave packet dynamics. J Chem Phys 1999. [DOI: 10.1063/1.479978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Koehl RM, Adachi S, Nelson KA. Direct Visualization of Collective Wavepacket Dynamics. J Phys Chem A 1999. [DOI: 10.1021/jp9922007] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Richard M. Koehl
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Satoru Adachi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Keith A. Nelson
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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31
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Coherent control of the molecular iodine vibrational dynamics by chirped femtosecond light pulses: theoretical simulation of the pump-probe experiment. Chem Phys 1999. [DOI: 10.1016/s0301-0104(99)00030-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Mishima K, Yamashita K. Theoretical study on quantum control of photodissociation and photodesorption dynamics by femtosecond chirped laser pulses. J Chem Phys 1999. [DOI: 10.1063/1.478684] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Buist AH, Mller M, Ghauharali RI, Brakenhoff GJ, Squier JA, Bardeen CJ, Yakovlev VV, Wilson KR. Probing microscopic chemical environments with high-intensity chirped pulses. OPTICS LETTERS 1999; 24:244-246. [PMID: 18071468 DOI: 10.1364/ol.24.000244] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
By varying the chirp of high-intensity pulses, we can use the chirp-condition-dependent fluorescence yield to distinguish among different molecules or the same molecule in different microenvironments. As an example of the latter we show that SNAFL-2, a well-known pH-sensitive dye, shows large modulation in fluorescence yield in response to both variation in acidity and variation in chirp condition. Future application of this technique as a novel contrast mechanism within fluorescence microscopy is discussed.
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35
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Akulin VM, Dubovitskii VA, Dykhne AM, Rudavets AG. Laser Control of Atomic Motion inside Diatomic Molecules. J Phys Chem A 1998. [DOI: 10.1021/jp980689i] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. M. Akulin
- Laboratory Aimé Cotton, Bat. 505, Campus d'Orsay, 91405 Orsay, France, Institute of Chemical Physics, 142432 Chernogolovka, Russia, TRINITI, 142092 Troitsk, Russia, and Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
| | - V. A. Dubovitskii
- Laboratory Aimé Cotton, Bat. 505, Campus d'Orsay, 91405 Orsay, France, Institute of Chemical Physics, 142432 Chernogolovka, Russia, TRINITI, 142092 Troitsk, Russia, and Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
| | - A. M. Dykhne
- Laboratory Aimé Cotton, Bat. 505, Campus d'Orsay, 91405 Orsay, France, Institute of Chemical Physics, 142432 Chernogolovka, Russia, TRINITI, 142092 Troitsk, Russia, and Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
| | - A. G. Rudavets
- Laboratory Aimé Cotton, Bat. 505, Campus d'Orsay, 91405 Orsay, France, Institute of Chemical Physics, 142432 Chernogolovka, Russia, TRINITI, 142092 Troitsk, Russia, and Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
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