标题： 独立控制谷电流的瞬时光学选择规则 显示英文标题

标题： Instantaneous optical selection rule for independent control of valley currents

摘要： 我们揭示了一种瞬时光学谷选择规则，该规则阐明了驱动激光场的瞬时光学手性与谷系统手性之间的耦合。 基于这一原理，我们提出并证明了一种单一手性分离的光学场，其中相反符号的瞬时光学手性在光学周期内被分离，从而能够独立操控来自K和K'谷的电流。 基于此方案，我们强调两个关键示例应用：(1) 不同谷的电流的完全分离，产生100%纯度的谷极化电流，以及(2) 生成净电荷流为零的纯谷电流。 我们的工作提供了一种强大且高度可控的全光学策略，用于在光学周期时间尺度上超快工程谷电流，为谷电子学和量子信息技术开辟了新的途径。 显示英文摘要

摘要： 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 valley systems. Building on this principle, we propose and demonstrate that a single chirality-separated optical field, in which oppositely signed instantaneous optical chiralities are separated within an optical cycle, enables independent manipulation of currents from K and K' valleys. Based on this scheme, we highlight two key example applications: (1) complete separation of currents from different valleys, yielding 100%-purity valley-polarized currents, and (2) generation of pure valley current with zero net charge flow. Our work offers a robust and highly controllable all-optical strategy for ultrafast engineering valley currents in the optical cycle timescale, paving a new avenue for valleytronics and quantum information technologies.