Effect of Carrier Envelope Phase on High-Order Harmonic Generation from Solid^*

Abstract

The dependence of harmonic emission from a solid on the carrier envelope phase (CEP) is discussed by numerically solving the time-dependent Schrödinger equation. The harmonic spectra periodically exhibit three distinct oscillating structures, which indicate the different dependences of the cutoff energies on the CEP. Furthermore, with time-dependent population imaging and the populations of different energy bands, the underlying physical mechanism is explored.

Modulation of High-Order Harmonic Generation from a Monolayer ZnO by Co-rotating Two-Color Circularly Polarized Laser Fields

“…In the past decade, a large number of theoret-ical and experimental studies related to HHG have been carried out for series of solid materials with different band gaps and properties. [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] Among them, two-dimensional crystal materials have become popular target for solid high-order harmonics due to their unique electronic structure, excellent optical properties, strong electron-electron interaction, and negligible propagation effects. [49,50] In addition, polarization characteristics of high-order harmonics of two-dimensional materials have a strong tunability, and it is possible to utilize two-dimensional materials to generate circularly polarized high-order harmonics.…”

Modifying the Electron Dynamics in High-Order Harmonic Generation via a Two-Color Laser Field

“…[19,20] To investigate interactions between intense laser fields and solids, researchers have proposed to employ a onedimensional monochromatic periodic potential to simulate the periodical structures of solids. [21][22][23] Furthermore, the model potential has been widely used to study solid HHG by solving the time-dependent Schrödinger equation (TDSE) based on the single active electron approximation. [24][25][26][27][28] Lu et al employed the model potential to intuitively study the dynamic process of HHG in solids via time-dependent population imaging.…”

Generation of Ultrafast Attosecond Magnetic Field from Ne Dimer in Circularly Polarized Laser Pulses

“…In recent years, with the rapid development of laser technology, researchers have been committed to studying microscopic phenomena inside molecules at attosecond timescales. [1][2][3][4][5] When the ultrafast intense laser field interacts with molecules, a series of nonlinear phenomena will occur, such as high-order harmonics, [6] non-ordered double ionization, [7] and above-threshold ionization. [8] Attosecond laser pulses can be achieved by higher-order harmonics, which can be obtained using femtosecond 10 −15 s lasers interacting with inert gases, [9,10] resulting in ultra-short laser pulses of 43 as in Ref.…”