Dynamic quantum state holography

Eickhoff, K.; Kerbstadt, S.; Bayer, Tim; Wollenhaupt, M.

doi:10.1103/physreva.101.013430

Cited by 12 publications

(31 citation statements)

References 54 publications

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“…The interferometer feeds the active control loop of the amplifier, which stabilizes the CEP of the shaped pulses before they are focused into the VMI spectrometer. The root mean squared CEP stability after the shaper was measured over 11 h and is better than 215 mrad [101]. Finally, dispersion control and pulse characterization are implemented in situ, i.e.…”

Section: Supercontinuum Polarization Pulse Shapingmentioning

confidence: 99%

“…The full potential of polarization-shaped bichromatic fields to generate and manipulate angular momentum superposition states via frequency mixing has been studied in [99]. Very recently, we introduced a shaperbased quantum state holography (SQuaSH) method by combining intra-and interband interferences using commensurable CEP-stable bichromatic fields for phasesensitive pump-probe measurements [101].…”

Section: Linearly Polarized Bichromatic Pulse Sequencesmentioning

confidence: 99%

“…efficiency, robustness and the disentanglement of target states, make frequency mixing a well-suited test-bed for bichromatic pumpprobe studies. The potential of shaper-based bichromatic pumpprobe spectroscopy was recently demonstrated on the examples of time-and angular-resolved measurement [177] and holographic observation [101] of ultrafast Rydberg dynamics and the time-resolved 3D imaging of ultrafast SOWP dynamics in potassium atoms [100]. In the latter experiment, the LCP blue pulse (pump) was tuned on resonance with the two 4p fine structure states 4p 1/2 and 4p 3/2 .…”

Section: Circularly Polarized Bichromatic Pulse Sequencesmentioning

confidence: 99%

“…For example, an auxiliary pulse can be used to provide a separate reference wave packet for an experimental implementation of wave packet holography. This extension opens up a manifold of coherent control scenarios ranging from multichromatic SQuaSH via the creation and manipulation of multiple FEVs to multichannel quantumphase clocks [101,220]. However, trichromatic MPI is not only an extension of bichromatic MPI but also changes the physical picture, since the number of available pathways and the number of target states scales differently with the number of pulses, as discussed in Section 2.2.2.…”

Section: Multichromatic Pulse Sequencesmentioning

confidence: 99%

“…Applications of photoelectron tomography have ranged from the generation and characterization of designer electron wave packets [95,96] and multiphoton photoelectron circular dichroism (PECD) measurements [97] to the extraction of transition matrix elements from tomographic data [98]. More recently, we have used photoelectron tomography to study free electron angular momentum wave packets [99], spin-orbit [100] and Rydberg wave packet dynamics [101] and photoelectron vortices with even [102][103][104] and odd [73] rotational symmetries. An overview of our recent photoelectron tomography studies of coherent control of atomic MPI can be found in [105,106].…”

Section: Introductionmentioning

confidence: 99%

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Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

et al. 2021

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In this review, we report on recent progress in the generation and application of multichromatic polarization-tailored pulse sequences for the coherent control of multiphoton ionization (MPI) dynamics and present unpublished experimental results that complement our previous findings. Specifically, we utilize single-color, bichromatic, and trichromatic polarization-controlled pulse sequences generated by spectral amplitude, phase and polarization modulation of a carrier-envelope phase (CEP)-stable white light supercontinuum for MPI. The analysis of the number of ionization pathways and the number of distinct final free electron states shows that both increase significantly, but scale differently with the number of absorbed photons and the number of pulses in the sequence. In our experiments, ultrafast polarization shaping is combined with high-resolution photoelectron tomography to generate, control, and reconstruct three-dimensional photoelectron momentum distributions from atomic and molecular MPI. We discuss the use of polarization-controlled single-color and bichromatic pulse sequences in perturbative and non-perturbative coherent control of coupled electron-nuclear dynamics in molecules, atomic spin-orbit wave packet dynamics and the directional photoemission from atoms and chiral molecules. We compare the coherent control of CEP-insensitive intraband multipath interference in the MPI with a fixed number of photons with CEP-sensitive interband multipath interference in the ionization with a different number of photons. The generation and control of free electron vortices with even-numbered rotational symmetry by MPI with single-color pulse sequences is contrasted with the bichromatic control of CEP-sensitive electron vortices with odd-numbered rotational symmetry. To illustrate the potential of multichromatic pulse sequences for coherent control, we present a trichromatic scheme for shaper-based quantum state holography.

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Section: Supercontinuum Polarization Pulse Shapingmentioning

confidence: 99%

Section: Linearly Polarized Bichromatic Pulse Sequencesmentioning

confidence: 99%

Section: Circularly Polarized Bichromatic Pulse Sequencesmentioning

confidence: 99%

Section: Multichromatic Pulse Sequencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

et al. 2021

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Coherent control mechanisms in bichromatic multiphoton ionization

Eickhoff¹,

Feld²,

Köhnke³

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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Free electron vortices (FEVs) generated by multiphoton ionization (MPI) with ultrashort laser pulses have attracted significant attention due to their varied symmetries and unusual topological properties. We study two physical mechanisms of coherent control in atomic MPI with bichromatic polarization-shaped femtosecond laser pulses which give rise to the rich variety of FEVs. In the experiments, we combine pulse shaping of a carrier-envelope phase-stable supercontinuum with photoelectron tomography to generate and reconstruct three-dimensional photoelectron momentum distributions (PMDs). Simultaneous measurements of energetically separated photoelectrons from intraband and interband interference in a single PMD allow us to compare phase and polarization control of the angular distributions by both mechanisms. We investigate phase control in three scenarios: first, counterrotating circularly polarized pulses are employed to contrast the phase-insensitive angular momentum eigenstate created by intraband interference via frequency mixing with the phase-sensitive c 7 rotationally symmetric FEV from pure interband interference of two single-color ionization pathways. In the second scenario, we use orthogonal linearly polarized pulses to compare the phase control properties of a six-lobed angular momentum wave packet from intraband interference to those of a complex shaped interband PMD in the presence of phase fluctuations. Finally, we demonstrate phase control of a photoelectron hologram from mixed interband interference. In a (3 + 1) resonance enhanced MPI scheme, the red pump pulse induces a bound electron wave packet probed by the time-delayed blue pulse. The latter simultaneously creates a reference wave packet by three-photon ionization to form the photoelectron hologram. Rotation of the hologram with c 1 or c 5 rotational symmetry maps the time evolution of the bound wave packet. To analyze our results, we develop analytical expressions for the wave functions of intraband and interband interference in perturbative non-resonant MPI. The experiments are complemented with two-dimensional TDSE simulations to follow the FEV formation dynamics and to validate the physical pictures.

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Orbital angular momentum superposition states in transmission electron microscopy and bichromatic multiphoton ionization

et al. 2020

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The coherent control of electron beams and ultrafast electron wave packet dynamics have attracted significant attention in electron microscopy as well as in atomic physics. In order to unify the conceptual pictures developed in both fields, we demonstrate the generation and manipulation of tailored electron orbital angular momentum (OAM) superposition states either by employing customized holographic diffraction masks in a transmission electron microscope or by atomic multiphoton ionization utilizing pulse-shaper generated carrier-envelope phase stable bichromatic ultrashort laser pulses. Both techniques follow similar physical mechanisms based on Fourier synthesis of quantum mechanical superposition states allowing the preparation of a broad set of electron states with uncommon symmetries. We describe both approaches in a unified picture based on an advanced spatial and spectral double slit and point out important analogies. In addition, we analyze the topological charge and discuss the control mechanisms of the free-electron OAM superposition states. Their generation and manipulation by phase tailoring in transmission electron microscopy and atomic multiphoton ionization is illustrated on a 7-fold rotationally symmetric electron density distribution.

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Dynamic quantum state holography

Cited by 12 publications

References 54 publications

Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

Multichromatic Polarization-Controlled Pulse Sequences for Coherent Control of Multiphoton Ionization

Coherent control mechanisms in bichromatic multiphoton ionization

Orbital angular momentum superposition states in transmission electron microscopy and bichromatic multiphoton ionization

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