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Chetty D, Glover RD, Tong XM, deHarak BA, Xu H, Haram N, Bartschat K, Palmer AJ, Luiten AN, Light PS, Litvinyuk IV, Sang RT. Carrier-Envelope Phase-Dependent Strong-Field Excitation. PHYSICAL REVIEW LETTERS 2022; 128:173201. [PMID: 35570453 DOI: 10.1103/physrevlett.128.173201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 03/15/2022] [Indexed: 06/15/2023]
Abstract
We present a joint experimental-theoretical study on the effect of the carrier-envelope phase (CEP) of a few-cycle pulse on the atomic excitation process. We focus on the excitation rates of argon at intensities in the transition between the multiphoton and tunneling regimes. Through numerical simulations, we show that the resulting bound-state population is highly sensitive to both the intensity and the CEP. The experimental data clearly agree with the theoretical prediction, and the results encourage the use of precisely tailored laser fields to coherently control the strong-field excitation process. We find a markedly different behavior for the CEP-dependent bound-state population at low and high intensities with a clear boundary, which we attribute to the transition from the multiphoton to the tunneling regime.
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Affiliation(s)
- D Chetty
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
| | - R D Glover
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
- Institute for Photonics and Advanced Sensing and School of Physical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - X M Tong
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - B A deHarak
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
- Physics Department, Illinois Wesleyan University, Bloomington, Illinois 61702-2900, USA
| | - H Xu
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
| | - N Haram
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
| | - K Bartschat
- Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311, USA
| | - A J Palmer
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
| | - A N Luiten
- Institute for Photonics and Advanced Sensing and School of Physical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - P S Light
- Institute for Photonics and Advanced Sensing and School of Physical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - I V Litvinyuk
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
| | - R T Sang
- Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia
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