3 papers
physics.optics2025
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…
physics.optics2024
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…
physics.optics2024
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…