Femtosecond time-resolved two-photon ionization spectroscopy of K2

Schwoerer, H.; Pausch, R.; Heid, M.; Engel, Volker; Kiefer, W.

doi:10.1063/1.475271

Cited by 42 publications

(27 citation statements)

References 36 publications

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“…Measurements using ion detection have attempted to determine the ionization probability as a function of the internuclear separation in diatomics (66)(67)(68)(69). However, because the ion signal is an electron energy-averaged quantity, these results are obscured by the potential presence of other ionization pathways.…”

Section: Imaging Electronic Changes Using Vibrational Wavepacketsmentioning

confidence: 98%

FEMTOSECOND LASER PHOTOELECTRON SPECTROSCOPY ON ATOMS AND SMALL MOLECULES: Prototype Studies in Quantum Control

Wollenhaupt

Engel

Baumert

2005

Annu. Rev. Phys. Chem.

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208

136

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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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Section: Imaging Electronic Changes Using Vibrational Wavepacketsmentioning

confidence: 98%

FEMTOSECOND LASER PHOTOELECTRON SPECTROSCOPY ON ATOMS AND SMALL MOLECULES: Prototype Studies in Quantum Control

Wollenhaupt

Engel

Baumert

2005

Annu. Rev. Phys. Chem.

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208

136

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“…[8][9][10][11] For example, the ground state of an ion is often better characterized than higher excited states of the neutral molecule, particularly for polyatomics. Ionization is also universal and hence there are no dark states.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond energy- and angle-resolved photoelectron spectroscopy

Arasaki

Takatsuka

Wang

et al. 2000

The Journal of Chemical Physics

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Articles you may be interested inComment on "Photoelectron angular distributions as a probe of alignment in a polyatomic molecule: Picosecond time-and angle-resolved photoelectron spectroscopy of S1 p-difluorobenzene" [J. Chem. Phys.111, 1438 (1999 We present a formulation of energy-and angle-resolved photoelectron spectra for femtosecond pump-probe ionization of wave packets and results of its application to the 1 ⌺ u ϩ double-minimum state of aligned Na 2 . The formulation is well-suited for inclusion of the underlying dynamics of molecular photoionization and its dependence on molecular geometry. Results are presented for three typical pump laser energies selected so as to investigate qualitatively different patterns of the spatio-temporal propagation of wave packets on the double-minimum potential curve and of their associated photoelectron spectra. Photoelectron angular distributions are also reported for different orientations of linearly polarized pump and probe pulses. The resulting photoelectron spectra illustrate the importance of a proper description of the underlying photoionization amplitudes and their dependence on geometry for unraveling wave packet dynamics from pump-probe photoelectron signals in nonadiabatic regions where the electronic structure evolves rapidly with geometry. The dependence of these photoelectron angular distributions on relative orientation of the molecule and polarization of the probe pulse are also seen to be potentially useful for real-time monitoring of molecular rotation.

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“…The experimental setup of our fs-CARS spectrometer is similar to that described previously 11,12,27 and is only briefly discussed here. Pulses of about 90 fs duration centered at 800 nm from a Ti:sapphire oscillator (Mira, Coherent) are used as seed pulses for a regenerative amplifier (CPA-1000, Clark MXR) with a repetition rate of 1 kHz.…”

Section: Methodsmentioning

confidence: 99%

“…9, the two strongest signals originate from the combinations 27 b 2g C 20 a 2g and 20 a 2g C 28 b 2g . The peak which is assigned to the combination of the two b 1g modes 12 and 11 is weaker.…”

Section: Octaethylporphyrinmentioning

confidence: 99%

Two‐dimensional probing of ground‐state vibrational dynamics in porphyrin molecules by fs‐CARS

Heid

Schlücker

Schmitt

et al. 2001

J Raman Spectroscopy

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We report on spectrally dispersed femtosecond time-resolved coherent anti-Stokes Raman scattering (CARS) for the investigation of the electronic ground-state vibrational dynamics of porphyrin molecules in solution. The two-dimensional experimental data obtained in our measurements provide a detailed mapping of the large number of molecular vibrations in these systems, excited by broadband ultrashort laser pulses, and make a thorough interpretation of the complex signal structure possible. In particular, an analysis of the data by applying Fourier transform methods to the time domain signal allows a clear identification of the excited porphyrin normal modes when compared with results on the mode structure from spectrally resolved (cw) spectroscopy. Altogether the method is capable of yielding detailed information on the dephasing behavior and on the relative spectral positions of the excited vibrations at the same time. Three porphyrin systems, dissolved in dichloromethane, were investigated: magnesium octaethylporphyrin, magnesium tetraphenylporphyrin and the free-base porphyrin octaethylporphyrin. The measurements were performed in the spectral region of the ring vibrations of the porphyrin macrocycle. We also provide a discussion of the expected signals on a theoretical basis by deriving the CARS third-order non-linear polarization for these experiments.

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Femtosecond time-resolved two-photon ionization spectroscopy of K2

Cited by 42 publications

References 36 publications

FEMTOSECOND LASER PHOTOELECTRON SPECTROSCOPY ON ATOMS AND SMALL MOLECULES: Prototype Studies in Quantum Control

FEMTOSECOND LASER PHOTOELECTRON SPECTROSCOPY ON ATOMS AND SMALL MOLECULES: Prototype Studies in Quantum Control

Femtosecond energy- and angle-resolved photoelectron spectroscopy

Two‐dimensional probing of ground‐state vibrational dynamics in porphyrin molecules by fs‐CARS

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