High harmonics and isolated attosecond pulses from MgO

Phys. Rev. Applied 15 , 014013 (2021)

High harmonics and isolated attosecond pulses from MgO

Zahra Nourbakhsh, Nicolas Tancogne-Dejean, Hamed Merdji,, Angel Rubio

On the basis of real-time ab initio calculations, we study the nonperturbative interaction of two-color laser pulses with MgO crystal in the strong-field regime to generate isolated attosecond pulses from high-harmonic emissions from MgO crystal. In this regard, we examine the impact of the characteristics of the incident pules, such as its shape, intensity, and ellipticity, as well as the consequences of the crystal anisotropy on the emitted harmonics and their corresponding isolated attosecond pulses. Our calculations predict the creation of isolated attosecond pulses with a duration of approximately 300 as; in addition, using elliptical driving pulses, we show the generation of elliptical isolated attosecond pulses. Our work prepares the path for all-solid-state compact optical devices offering perspectives beyond traditional isolated attosecond pulses emitted from atoms.

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This work was supported by the European Research Council (Grant No. ERC-2015-AdG694097), the Deutsche Forschungsgemeinschaft through the Priority Programme Quantum Dynamics in Tailored Intense Fields, Grupos Consolidados (Grant No. IT1249-19), the Cluster of Excellence Advanced Imaging of Matter, and the Max Planck – New York City Center for Non-Equilibrium Quantum Phenomena. The Flatiron Institute, which is a division of the Simons Foundation, is acknowledged. H.M. acknowledges support from PETACom FET Open Horizon 2020 (Grant No. 829153), OPTOLogic FET Open Horizon 2020 (Grant No. 899794), DGA RAPID grant “SWIM,” the C’NANO research program through a NanoscopiX grant, and LABEX “PALM” (ANR-100LABX-0039- PALM) through grants “Plasmon-X” and “STAMPS.” We acknowledge financial support from the French ASTRE program through the grant “NanoLight.” Fruitful discussion with O.D. Mücke is acknowledged.

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