Quantum optical signatures in strong-field laser physics: Infrared photon counting in high-order-harmonic generation

Gonoskov, I. A. and Tsatrafyllis, N. and Kominis, I. K. and Tzallas, Paraskevas (2016) Quantum optical signatures in strong-field laser physics: Infrared photon counting in high-order-harmonic generation. SCIENTIFIC REPORTS, 6. ISSN 2045-2322

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Abstract

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 Schr¨odinger 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 gen- eration (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.

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