Quantum control of atomic two-photon ionization by ultrashort light pulse effect

We demonstrate that the two-photon photoelectron spectrum can be manipulated by an ultrashort light pulse. We decompose a short pulse into a linear superposition of Fourier modes. The two-photon transition amplitude becomes a summation of all pathways. The contribution of each pathway was accurately...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2017-07, Vol.71 (7), p.1-7, Article 199
Main Authors: Lee, Han Chieh, Jheng, Shih Da, Jiang, Tsin Fu
Format: Article
Language:English
Subjects:
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Circular polarization
Digital imaging
Energy consumption
Fourier analysis
Ionization
Molecular
Optical and Plasma Physics
Photon absorption
Physical Chemistry
Physics
Physics and Astronomy
Polarized light
Pulse duration
Quantum Information Technology
Quantum Physics
Regular Article
Spectroscopy/Spectrometry
Spintronics
Superposition (mathematics)
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Summary:We demonstrate that the two-photon photoelectron spectrum can be manipulated by an ultrashort light pulse. We decompose a short pulse into a linear superposition of Fourier modes. The two-photon transition amplitude becomes a summation of all pathways. The contribution of each pathway was accurately calculated by using a second-order variational method. By properly choosing the carrier frequency and pulse duration according to the calculated two-photon absorption factor versus the absorbed first photon energy, the photoelectron spectrum can become single- or double-peaked. We use the hydrogen atom as a model and study both cases of linearly and circularly polarized light pulse. Graphical abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/e2017-80135-5