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Ultrasensitive Anisotropic Room-Temperature Terahertz Photodetector Based on an Intrinsic Magnetic Topological Insulator MnBiTe.
Nano Lett
September 2022
Research Center for Intelligent Networks, Zhejiang Lab, Hangzhou 311121, China.
Article Synopsis
- Terahertz photodetectors utilizing intrinsic magnetic topological insulators, like MnBiTe, exhibit impressive sensitivity and performance at room temperature due to their unique material properties.
- MnBiTe flakes demonstrate sensitivity comparable to commercial detectors, achieving a noise equivalent power of 13 pW/Hz at 0.275 THz, facilitating high-resolution terahertz imaging through the nonlinear Hall effect.
- Notably, these detectors exhibit strong polarization-dependent responses and a novel power-controlled reversal of response in devices combining MnBiTe and graphene, highlighting the potential for advanced applications of topological materials in electronics.