Quantum optical signatures in strong-field laser physics: Infrared photon counting in high-order-harmonic generation.
We analytically describe the strong-field light-electron interaction using a quantized coherent laser state with arbitrary photon number. We obtain a light-electron wave function which is a closed-form solution of the time-dependent Schrödinger equation (TDSE). This wave function provides information about the quantum optical features of the interaction not accessible by semi-classical theories. With this approach we can reveal the quantum optical properties of high harmonic generation (HHG) process in gases by measuring the photon statistics of the transmitted infrared (IR) laser radiation. This work can lead to novel experiments in high-resolution spectroscopy in extreme-ultraviolet (XUV) and attosecond science without the need to measure the XUV light, while it can pave the way for the development of intense non-classical light sources.
Foundation for Research and Technology-Hellas, Institute of Electronic Structure &Laser, P.O. Box 1527, GR-71110 Heraklion (Crete), Greece.|Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany.
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Gonoskov
Foundation for Research and Technology-Hellas, Institute of Electronic Structure &Laser, P.O. Box 1527, GR-71110 Heraklion (Crete), Greece.|Department of Physics, University of Crete, 71103 Heraklion, Greece.
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Tsatrafyllis
Department of Physics, University of Crete, 71103 Heraklion, Greece.
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Kominis
Foundation for Research and Technology-Hellas, Institute of Electronic Structure &Laser, P.O. Box 1527, GR-71110 Heraklion (Crete), Greece.
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Tzallas