Coherent phase control of resonance-mediated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>three-photon absorption

Gandman, Andrey; Chuntonov, Lev; Rybak, Leonid; Amitay, Zohar

doi:10.1103/physreva.75.031401

Cited by 70 publications

(79 citation statements)

References 27 publications

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“…Its upper limit is measured here to be 300-fold smaller than the TL absorption, as set by the best-achieved experimental noise. The resonance-mediated (2+1) three-photon absorption is experimentally controlled from 3% to 240% of the TL absorption [24]. The strong enhancement occurs when ω base step =ω 7p,4s =12801 cm −1 .…”

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confidence: 99%

“…The processes under study here are multiphoton absorption processes that are of fundamental and applicative importance and have been shown to be coherently controlled very effectively [6,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]. The present atomic scenario involves a non-resonant two-photon absorption channel that is coherently incorporated in a resonance-mediated (2+1) three-photon absorption channel.…”

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confidence: 99%

“…The present atomic scenario involves a non-resonant two-photon absorption channel that is coherently incorporated in a resonance-mediated (2+1) three-photon absorption channel. Their one-channel control have previously been studied separately [15,24]. Here, by utilizing a symmetry property of the two-photon absorption for proper pulse shaping, the three-photon absorption is tuned independently over order-of-magnitude yield range for any possible yield of the two-photon absorption.…”

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confidence: 99%

“…Hence, when irradiated with a weak (shaped) femtosecond pulse a non-resonant two-photon absorption from |g to |f 1 is induced simultaneously with a resonance-mediated (2+1) three-photon absorption from |g to |f 2 with |f 1 as an intermediate state. The final (complex) amplitudes A f 1 and A f 2 of states |f 1 and |f 2 after the pulse is over are given, respectively, by 2 nd -and 3 rd -order time-dependent perturbation theory as [15,24] …”

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confidence: 99%

“…In other separate studies [24], the π-step pat- Experimentally, a sodium vapor in a heated cell is irradiated with such laser pulses, after they undergo shaping in an optical setup incorporating a pixelated liquid-crystal spatial light phase modulator [1]. The effective spectral shaping resolution is δω shaping =2.05 cm −1 per pixel.…”

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Multichannel Selective Femtosecond Coherent Control Based on Symmetry Properties

et al. 2008

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We present and implement a new scheme for extended multi-channel selective femtosecond coherent control based on symmetry properties of the excitation channels. Here, an atomic non-resonant two-photon absorption channel is coherently incorporated in a resonance-mediated (2+1) threephoton absorption channel. By proper pulse shaping, utilizing the invariance of the two-photon absorption to specific phase transformations of the pulse, the three-photon absorption is tuned independently over order-of-magnitude yield range for any possible two-photon absorption yield.Noticeable is a set of "two-photon dark pulses" inducing widely-tunable three-photon absorption.

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Multichannel Selective Femtosecond Coherent Control Based on Symmetry Properties

et al. 2008

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Strong‐Field Coherent Control

Shapiro

Brumer

2011

Quantum Control of Molecular Processes

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The work presented in this thesis is geared towards the understanding of coherent control in molecules and atoms in strong fields. The analysis is done by studying multiphoton transitions. We present a theoretical model that describes multiphoton transitions under strong fields. We show that in order to achieve population inversion a phase-matching condition between the laser and the atom needs to be satisfied. This phase matching condition shows that fields need to be tailored taking into account the presence of the dynamic stark shift (DSS) effect and compensating for it. These findings are corroborated by experimental results and simulations. Experimentally, we used a genetic algorithm (GA) to find pulse shapes that can efficiently excite atomic Na to the 4s state by means of a two photon absorption. The solutions found by the GA are used directly to integrate Schrödinger's equations for the amplitudes. The results of using this scheme ratify our theoretical model. We also map how the transition from the weak to the strong field limit occurs for two and three level systems in the presence of multiphoton transitions. Here, we show that the perturbative solutions are a particular case of our model and they are recovered in iii

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A three‐level dark state and double‐control single‐photon logic gates via quantum coherent control

Shen

2011

Annalen der Physik

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Multilevel quantum coherence and its quantum-vacuum counterpart, where a three-level dark state is involved, are suggested in order to achieve new photonic and quantum optical applications. It is shown that such a three-level dark state in a four-level tripod-configuration atomic system consists of three lower levels, where constructive and destructive quantum interference between two control transitions (driven by two control fields) arises. We point out that the controllable optical response due to the double-control tunable quantum interference can be utilized to design some fascinating new photonic devices such as logic gates, photonic transistors and switches at quantum level. A single-photon two-input XOR logic gate (in which the incident "gate" photons are the individual light quanta of the two control fields) based on such an effect of optical switching control with an EIT (electromagnetically induced transparency) microcavity is suggested as an illustrative example of the application of the dark-state manipulation via the double-control quantum interference. The present work would open up possibility of new applications in both fundamental physics (e.g., field quantization and relevant quantum optical effects in artificial systems that can mimic atomic energy levels) and applied physics (e.g., photonic devices such as integrated optical circuits at quantum level).

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Coherent phase control of resonance-mediated(2+1)three-photon absorption

Cited by 70 publications

References 27 publications

Multichannel Selective Femtosecond Coherent Control Based on Symmetry Properties

Multichannel Selective Femtosecond Coherent Control Based on Symmetry Properties

Strong‐Field Coherent Control

A three‐level dark state and double‐control single‐photon logic gates via quantum coherent control

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