Unlocking the vast potential of optical sensing technology has long been hindered by the challenges of achieving fast, sensitive, and broadband photodetection at ambient temperatures. In this review, we summarize recent progress in the study of nonlinear photocurrent in topological quantum materials, and its application in broadband photodetection without the use of p–n junction based semiconductor diodes. The intrinsic quadratic transverse current-input voltage relation is used to rectify the alternating electric field from incident radio, terahertz or infrared waves into a direct current, without a bias voltage and at zero magnetic field. We review novel photocurrents in several material systems, including topological Weyl semimetals, chiral crystals, ferroelectric materials, and low dimensional topological insulators. These quantum materials hold tremendous promise for broadband high-frequency rectification and photo-detection, featuring substantial responsivity and detectivity.

中文翻译：

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用于宽带光探测的量子材料中的非线性光电流


长期以来，在环境温度下实现快速、灵敏和宽带光检测的挑战一直阻碍着释放光学传感技术的巨大潜力。在这篇综述中，我们总结了拓扑量子材料中非线性光电流研究的最新进展，及其在不使用基于 p-n 结的半导体二极管的宽带光探测中的应用。本征二次横向电流-输入电压关系用于将来自入射无线电、太赫兹或红外波的交变电场整流为直流电，无偏置电压且磁场为零。我们回顾了几种材料系统中的新型光电流，包括拓扑 Weyl 半金属、手性晶体、铁电材料和低维拓扑绝缘体。这些量子材料在宽带高频整流和光探测方面具有巨大的前景，具有很高的响应性和探测能力。