Beam steering at the nanosecond time scale with an atomically thin reflector.
Beam steering at the nanosecond time scale with an atomically thin reflector.
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DOI：
10.1038/s41467-022-29976-0
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发表时间：
2022-06-14
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
在亚波长尺度上塑造光流的技术使全新的光学系统和设备应用成为可能。实现具有快速、可调谐组件的可编程、有源光学系统是该领域的突出挑战之一。在这里，我们通过实验演示了一种基于原子薄半导体中激子静电门控制的几像素光束控制装置，具有强光与物质相互作用。通过将 MoSe2 单层的高反射率与石墨烯分栅几何结构相结合，我们塑造了波前相位轮廓，以实现 10° 范围内的连续可调光束偏转、二维光束转向和低至 1.6 纳秒的切换时间。我们的方法为新型原子薄光学系统打开了大门，例如快速可切换的光束阵列和在基本厚度极限下运行的量子超表面。安徒生等人。展示了一种基于原子薄半导体激子响应的新型光束控制装置。使用静电门，作者实现了纳秒级开关时间的可调转向。
Techniques to mold the flow of light on subwavelength scales enable fundamentally new optical systems and device applications. The realization of programmable, active optical systems with fast, tunable components is among the outstanding challenges in the field. Here, we experimentally demonstrate a few-pixel beam steering device based on electrostatic gate control of excitons in an atomically thin semiconductor with strong light-matter interactions. By combining the high reflectivity of a MoSe2 monolayer with a graphene split-gate geometry, we shape the wavefront phase profile to achieve continuously tunable beam deflection with a range of 10°, two-dimensional beam steering, and switching times down to 1.6 nanoseconds. Our approach opens the door for a new class of atomically thin optical systems, such as rapidly switchable beam arrays and quantum metasurfaces operating at their fundamental thickness limit. Andersen et al. have demonstrated a new type of beam steering device based on the excitonic response of an atomically thin semiconductor. Using electrostatic gates, the authors achieved tunable steering with switching times on the nanosecond scale.
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影响因子：
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