143 citations · 615 across the 15 of their papers we have counts for
15 papers
Instantaneous optical selection rule for independent control of valley currents
Wanzhu He, Xiaosong Zhu, Liang Li +4
We reveal an instantaneous optical valley selection rule that illuminates the coupling between the instantaneous optical chirality of the driving laser field and the chirality of v…
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…
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…
Determination of Electron Band Structure using Temporal Interferometry
Liang Li, Pengfei Lan, Lixin He +3
We propose an all-optical method to directly reconstruct the band structure of semiconductors. Our scheme is based on the temporal Young's interferometer realized by high harmonic…
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…
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…
Scaling law of high harmonic generation in the framework of photon channel
Liang Li, Pengfei Lan, Lixin He +3
Photon channel perspective on high harmonic generation (HHG) is proposed by quantizing both the driving laser and high harmonics. It is shown that the HHG yield can be expressed as…
Helicity reversion in high harmonic generation driven by bichromatic counterrotating circularly polarized laser fields
Xiaofan Zhang, Liang Li, Xiaosong Zhu +4
We investigate the polarization properties of high harmonics generated with the bichromatic counterrotating circularly polarized (BCCP) laser fields by numerically solving time-dep…
The selection rules of high harmonic generation: the symmetries of molecules and laser fields
Xi Liu, Xiaosong Zhu, Liang Li +4
The selection rules of high harmonic generation (HHG) are investigated using three-dimensional time-dependent density functional theory (TDDFT). From the harmonic spectra obtained…
Topological phase transitions driven by magnetic phase transitions in FexBi2Te3 (0 < x < 0.1) single crystals
Heon-Jung Kim, Ki-Seok Kim, J. -F. Wang +11
We propose a phase diagram for FexBi2Te3 (0 < x < 0.1) single crystals, which belong to a class of magnetically bulk-doped topological insulators. The evolution of magnetic correla…