Project Details
Projekt
Generation of bright non-classical light based on high harmonics and its use in quantum spectroscopy
Subject Area
Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
Term
since 2024
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 545591821
The last two decades witnessed increased interest to macroscopic quantumness, due to both its fundamental importance and possible applications. As a result, nonclassical states of light have been developed that are bright enough to empower strong-field interactions such as non-perturbative high harmonic generation (HHG) in solid states. Theoretical studies showed that nonclassical light can modify the electron dynamics and thus HHG properties. In parallel, HHG from strongly driven semiconductors using classical ultrafast laser can generate high photon number quantum light. Here, combining German/French expertises we will study the non-perturbative generation of HHG in semiconductors driven by coherent laser light (few optical cycles) or pure quantum light (bright squeezed vacuum and sub-Poissonian states). We expect enhancement of the HHG emission, a modification of their spectra, and the appearance of quantum features such as photon-number correlations and multipartite entanglement. The use of bright squeezed vacuum will enable the spectroscopy of electrons in solids within ranges never accessible through coherent-light excitation. Finally, even with coherent-light excitation but using resonant material systems, we will look for quantum signatures in the radiation of high harmonics. In the classical laser driven systems, we will employ few optical cycles lasers to control light states on attosecond time scales.
DFG Programme
Research Grants
International Connection
France
Partner Organisation
Agence Nationale de la Recherche / The French National Research Agency
Cooperation Partner
Professor Emmanuel Péronne, Ph.D.
