Insight into High-order Harmonic Generation from Solids: The Contributions of the Bloch Wave-packets Moving on the Group and Phase Velocities

Abstract

We study numerically the Bloch electron wavepacket dynamics in periodic potentials to simulate laser-solid interactions. We introduce a new perspective in the coordinate space combined with the motion of the Bloch electron wavepackets moving at group and phase velocities under the laser fields. This model interprets the origins of the two contributions (intra- and interband transitions) of the high-order harmonic generation (HHG) by investigating the local and global behavior of the wavepackets. It also elucidates the underlying physical picture of the HHG intensity enhancement by means of carrier-envelope phase (CEP), chirp and inhomogeneous fields. It provides a deep insight into the emission of high-order harmonics from solids. This model is instructive for experimental measurements and provides a new avenue to distinguish mechanisms of the HHG from solids in diffrent laser fields.

References in corpus (5)

• High harmonic generation from Bloch electrons in solids
• Strong-Field Perspective on High-Harmonic Radiation from Bulk Solids
• Plasmon-assisted high-harmonic generation in graphene
• Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields
• Mechanism of High-Order Harmonic Generation from Periodic Potentials

Cited by in corpus (3)

• Crystal-momentum-resolved contributions to multiple plateaus of high-order harmonic generation from band-gap materials
• Probing dephasing time of crystals via spectral properties of high-harmonic generation
• Orientation-dependent transition rule in high-order harmonic generation from solids