Terahertz (THz) photonics is a key-enabling technology for a wealth of urgently demanding applications and societal challenges like ultrahigh speed communication systems, medical imaging and diagnostics, industrial and food quality control, and security screening. Therefore, making novel THz materials, that are able to effectively interact and manipulate THz radiation, is a challenge in this respect. Dirac materials that are endowed with linearly dispersed electronic bands, are a promising frontier in this framework as they are suited to generate plasmon resonances in the THz regime. Dirac materials include the well-known cases of graphene and three dimensional topological insulators. In perspective they can be extended to new emerging materials including graphene-like Xenes (from silicene to bismuthene) and Weyl/Dirac semimetals. In addition to the materials aspects, in this perspective review we deliberately single out an easy framework where to validate Dirac materials for THz applications. This one includes the optical conductivity deduced by THz spectroscopy as a good figure of merit, and the micro-ribbon pattern as a good plasmonic grating. In the end, we outline future challenges and current bottlenecks in the production and exploitation of Dirac materials in the THz technology.

太赫兹（THz）光子学是一项关键的启用技术，可应对众多急需的应用和社会挑战，例如超高速通信系统，医学成像和诊​​断，工业和食品质量控制以及安全检查。因此，在这方面，制造能够有效相互作用和控制太赫兹辐射的新型太赫兹材料是一项挑战。具有线性分散的电子带的狄拉克材料在该框架中是一个有前途的前沿，因为它们适合在太赫兹范围内产生等离子体激元共振。Dirac材料包括众所周知的石墨烯和三维拓扑绝缘体。从角度看，它们可以扩展到新兴材料，包括类石墨烯的Xenes（从硅烯到铋）和Weyl / Dirac半金属。除了材料方面，在此透视图中，我们特意提出了一个简单的框架，可在其中验证THz应用的Dirac材料。这包括通过THz光谱法推导的光导率作为良好的品质因数，以及微带状图案作为良好的等离激元光栅。最后，我们概述了在太赫兹技术中生产和开发Dirac材料的未来挑战和当前的瓶颈。