Semimetals are being explored for their unique advantages in low-energy high-speed photodetection, although they suffer from serious drawbacks such as an intrinsically high dark current. In this Perspective, we envision the exploitation of topological effects in the photoresponse of these materials as a promising route to circumvent these problems. We overview recent studies on photodetection based on graphene and other semimetals, and further discuss the opportunities created by topological effects, along with the additional challenges that they impose on photodetector designs.

中文翻译：

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用于高性能光电检测的半金属。

人们正在探索半金属在低能量高速光电检测中的独特优势，尽管它们具有诸如固有的高暗电流之类的严重缺陷。在此观点中，我们设想利用这些材料的光响应中的拓扑效应作为解决这些问题的有希望的途径。我们概述了基于石墨烯和其他半金属的光电检测的最新研究，并进一步讨论了拓扑效应所带来的机遇，以及它们对光电探测器设计的其他挑战。