Independent control over the amplitude, phase, and polarization of femtosecond pulses

Plewicki, Mateusz; Weber, Stefan; Weise, Fabian; Lindinger, Albrecht

doi:10.1007/s00340-006-2464-y

Cited by 36 publications

(23 citation statements)

References 16 publications

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“…It was implemented by adapting the amplitude depending on the difference retardance ⌬ i of the second pass using a table. 14 In Fig. 2͑c͒, we can see that the optimization achieves a total factor of 2.08.…”

Section: Resultsmentioning

confidence: 92%

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Parametric polarization pulse shaping demonstrated for optimal control of NaK

Weber

Plewicki

Weise

et al. 2008

The Journal of Chemical Physics

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We present a routine for calculating and producing customized/parametric femtosecond laser pulses for investigating molecular processes involving the polarization. It is applied on the ionization of NaK molecules by feedback-loop optimization using the recently introduced double-pass "serial setup" that is capable of phase, amplitude, and polarization modulation. The temporal subpulse encoding uses the parameters distance, intensity, zero order spectral phase, and polarization state.

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Section: Resultsmentioning

confidence: 92%

“…It uses the recently introduced serial setup, 14 implements the amplitude, and has the only drawback of minor side pulses. As for an application, we demonstrate a polarization-enabled coherent control experiment on NaK, comparing free and parametric optimizations with and without polarization shaping.…”

Section: Introductionmentioning

confidence: 99%

Parametric polarization pulse shaping demonstrated for optimal control of NaK

Weber

Plewicki

Weise

et al. 2008

The Journal of Chemical Physics

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“…Ultra-short pulse shaping techniques are based on dispersive optics, such as double grating pulse shapers, which, to date, are not available with suitable resolution for narrow bandwidth picosecond pulses, and hence rules out their use. However, the manipulation of femtosecond pulses is a standard technique and offers a lot of freedom in controlling phase, amplitude and polarization [26].…”

Section: General Considerationsmentioning

confidence: 99%

Photoassociation and coherent transient dynamics in the interaction of ultracold rubidium atoms with shaped femtosecond pulses. I. Experiment

et al. 2009

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We experimentally investigate various processes present in the photoassociative interaction of an ultracold atomic sample with shaped femtosecond laser pulses. We demonstrate the photoassociation of pairs of rubidium atoms into electronically excited, bound molecular states using spectrally cut femtosecond laser pulses tuned below the rubidium D1 or D2 asymptote. Time-resolved pumpprobe spectra reveal coherent oscillations of the molecular formation rate, which are due to coherent transient dynamics in the electronic excitation. The oscillation frequency corresponds to the detuning of the spectral cut position to the asymptotic transition frequency of the rubidium D1 or D2 lines, respectively. Measurements of the molecular photoassociation signal as a function of the pulse energy reveal a non-linear dependence and indicate a non-perturbative excitation process. Chirping the association laser pulse allowed us to change the phase of the coherent transients. Furthermore, a signature for molecules in the electronic ground state is found, which is attributed to molecule formation by femtosecond photoassociation followed by spontaneous decay. In a subsequent article [A. Merli et al., submitted] quantum mechanical calculations are presented, which compare well with the experimental data and reveal further details about the observed coherent transient dynamics.

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“…Among other techniques, Optimal Control Theory (OCT) [22,23,24,25] has become an efficient tool for designing laser pulses able to control quantum processes. The optimal field is the field employed in order to steer a dynamical system from a initial state to a desired target state minimizing a cost functional which generally penalizes the energy (fluence) of the pulse.…”

Section: Introductionmentioning

confidence: 99%

Optimal control of a charge qubit in a double quantum dot with a Coulomb impurity

Coden

Romero

Ferrón

et al. 2017

Physica E: Low-dimensional Systems and Nanostructures

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Abstract. We study the efficiency of modulated laser pulses to produce efficient and fast charge localization transitions in a two-electron double quantum dot. We use a configuration interaction method to calculate the electronic structure of a quantum dot model within the effective mass approximation. The interaction with the electric field of the laser is considered within the dipole approximation and optimal control theory is applied to design high-fidelity ultrafast pulses in pristine samples. We assessed the influence of the presence of Coulomb charged impurities on the efficiency and speed of the pulses. A protocol based on a two-step optimization is proposed for preserving both advantages of the original pulse. The processes affecting the charge localization is explained from the dipole transitions of the lowest lying two-electron states, as described by a discrete model with an effective electron-electron interaction.

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Independent control over the amplitude, phase, and polarization of femtosecond pulses

Cited by 36 publications

References 16 publications

Parametric polarization pulse shaping demonstrated for optimal control of NaK

Parametric polarization pulse shaping demonstrated for optimal control of NaK

Photoassociation and coherent transient dynamics in the interaction of ultracold rubidium atoms with shaped femtosecond pulses. I. Experiment

Optimal control of a charge qubit in a double quantum dot with a Coulomb impurity

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