143 citations · 977 across the 30 of their papers we have counts for
16 papers · 1 filter
Complete suppression of the non-dipole drift effect in high harmonic generation
Hailang Wei, Xiaosong Zhu, Pengfei Lan +1
In high harmonic generation (HHG), non-dipole effects become increasingly significant at long driving wavelengths, as the magnetic field leads to a lateral drift of the continuum e…
Attosecond All-Optical Retrieval of Valley Polarization via Circular Dichroism in Transient Absorption
Wenqing Li, Xiaosong Zhu, Pengfei Lan +5
We propose a scheme for retrieving the ultrafast valley polarization (VP) dynamics in two-dimensional hexagonal materials via attosecond circular dichroism (CD) transient absorptio…
Helicity-selected near-circularly polarized attosecond pulses generated from mixed He-Ne gases
Chunyang Zhai, Xiaosong Zhu, Yingbin Li +4
We present and theoretically demonstrate a method for generating helicity-selected near-circularly polarized attosecond pulses in mixed He-Ne gases using bichromatic counter-rotati…
High-purity valley-polarized currents induced by bichromatic optical fields in two-dimensional materials
Wenqing Li, Xiaosong Zhu, Liang Li +4
Producing currents predominantly from a single valley, namely valley-polarized currents, at optical-cycle timescales is an important aspect of the petahertz valleytronics, yet it r…
High Harmonic Generation in Solids: Particle and Wave Perspectives
Liang Li, Pengfei Lan, Xiaosong Zhu +1
High harmonic generation (HHG) from gas phase atoms (or molecules) has opened up a new frontier in ultrafast optics, where attosecond time resolution and Angstrom spatial resolutio…
Fingerprint of the Interbond Electron Hopping in Second-Order Harmonic Generation
Liang Li, Tengfei Huang, Pengfei Lan +6
We experimentally explore the fingerprint of the microscopic electron dynamics in second-order harmonic generation (SHG). It is shown that the interbond electron hopping induces a…
Strong field induced electron density tide in high harmonic generation from solids
Liang Li, Yinfu Zhang, Pengfei Lan +8
In strong laser fields, the electron density in solids can show up tidal motions caused by the laser ``pulling'' on the electrons, which forms an electron density tide (EDT). Howev…
Molecular rotation movie filmed with high-harmonic generation
Yanqing He, Lixin He, Pengfei Lan +5
Direct imaging of molecular dynamics is a long-standing goal in physics and chemistry. As an emerging tool, high-harmonic spectroscopy (HHS) enables accessing molecular dynamics on…
Reciprocal-space-trajectory perspective on high harmonic generation in solids
Liang Li, Pengfei Lan, Xiaosong Zhu +4
We revisit the mechanism of high harmonic generation (HHG) from solids by comparing HHG in laser fields with different ellipticities but constant maximum amplitude. It is shown tha…
High harmonic generation with circularly polarized fields in solid: a quantum trajectory perspective
Liang Li, Pengfei Lan, Xiaosong Zhu +2
We investigate the high harmonic generation (HHG) in solids driven by laser fields with different ellipticities. The HHG spectra show a two-plateau structure within the energy gap…
Tomography of asymmetric molecular orbitals with one-color inhomogeneous field
Hua Yuan, Lixin He, Feng Wang +4
We demonstrate to image asymmetric molecular orbitals via high-order harmonic generation in a one-color inhomogeneous field. Due to the broken inversion symmetry of the inhomogeneo…
High-order harmonic generation of doped semiconductor
Tengfei Huang, Xiaosong Zhu, Liang Li +3
We investigate the high-order harmonic generation (HHG) in doped semiconductors. The HHG is simulated with the single-electron time-dependent Schrödinger equation (TDSE). The resul…
Diffractive molecular orbital tomography
Chunyang Zhai, Xiaosong Zhu, Pengfei Lan +7
High harmonic generation in the interaction of femtosecond lasers with atoms and molecules opens the path to molecular orbital tomography and to probe the electronic dynamics with…
Imprints of the molecular-orbital geometry on the high-harmonic ellipticity
Meiyan Qin, Xiaosong Zhu, Kunlong Liu +2
The influence of the orbital symmetry on the ellipticity of the high-order harmonics is investigated. It is found that the ellipticity maps have distinct shapes for the molecular o…
Interference of high-order harmonics generated from molecules at different alignment angles
Meiyan Qin, Xiaosong Zhu, Yang Li +3
We theoretically investigate the interference effect of high-order harmonics generated from molecules at different alignment angles. It is shown that the interference of the harmon…
Broadband large-ellipticity harmonic generation with polar molecule
Meiyan Qin, Xiaosong Zhu, Qingbin Zhang +2
We investigate the polarization properties of high harmonic generation from polar molecules with a linearly polarized field. It is found that elliptically polarized harmonics are o…