Photo-mixing with its advantages of ultra-large bandwidth and precise tunability has emerged as an important technique for terahertz (THz) wave generation. Recently, graphene photodetectors exhibiting a large bandwidth are expected to further boost the development of integrated THz emitters. Here, we fabricate a sub-THz emitter based on a large-bandwidth silicon–plasmonic graphene (SPG) photodetector integrated with a broadband rounded bow-tie THz antenna. The SPG sub-THz emitter is experimentally demonstrated to emit sub-THz waves with a radiation spectrum from 50 to 300 GHz. A maximum sub-THz emission power of 5.4 nW is obtained at 145 GHz with only 3 mW input light power. The SPG sub-THz emitter can be fabricated by a CMOS-compatible process, which offers enormous opportunities for its use in a variety of THz applications.

中文翻译：

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天线集成硅-等离子体石墨烯亚太赫兹发射器

光混合以其超大带宽和精确可调性的优势已成为太赫兹 (THz) 波生成的重要技术。最近，具有大带宽的石墨烯光电探测器有望进一步推动集成太赫兹发射器的发展。在这里，我们制造了一个基于大带宽硅等离子体石墨烯 (SPG) 光电探测器的亚太赫兹发射器，并集成了宽带圆形领结太赫兹天线。实验证明 SPG 亚太赫兹发射器可发射辐射光谱范围为 50 至 300 GHz 的亚太赫兹波。在 145 GHz 下仅 3 mW 输入光功率即可获得 5.4 nW 的最大亚太赫兹发射功率。SPG 亚太赫兹发射器可以通过与 CMOS 兼容的工艺制造，这为其在各种太赫兹应用中的使用提供了巨大的机会。