论文标题
Terahertz光电检测在可伸缩的单层 - 石膏和六边形硝酸硼异质结构中
Terahertz photodetection in scalable single-layer-graphene and hexagonal boron nitride heterostructures
论文作者
论文摘要
单层石墨烯（SLG）的独特光电特性非常适合从X射线到微波炉开发光子设备的光子设备的开发。在Terahertz（THZ）范围（0.1-10 THz频率）中，这导致了具有最先进的性能的光学调节器，非线性源和光电轨道的发展。一个关键的挑战是以可扩展的方式将基于SLG的活性元素与先前存在的技术平台集成，同时保持不受干扰的性能水平。在这里，我们报告了大区域SLG中室温检测的开发，该检测是由化学蒸气沉积（CVD）生长的，该室温集成了天线偶联的场效应晶体管中。我们有选择地激活光电电气检测动力学，并在AL2O3上采用不同的介电构型，带有和没有大区域CVD HBN限额，以研究其对SLG热电性能的影响。借助这些可扩展的架构，在零偏置操作下实现了响应时间〜5NS和噪声等效功率〜1NWHz-1/2。这显示了可扩展的大面积，分层材料异质结构用于检测的可行性。
The unique optoelectronic properties of single layer graphene (SLG) are ideal for the development of photonic devices across a broad range of frequencies, from X-rays to microwaves. In the terahertz (THz) range (0.1-10 THz frequency) this has led to the development of optical modulators, non-linear sources, and photodetectors, with state-of-the-art performances. A key challenge is the integration of SLG-based active elements with pre-existing technological platforms in a scalable way, while maintaining performance level unperturbed. Here, we report on the development of room temperature THz detection in large-area SLG, grown by chemical vapor deposition (CVD), integrated in antenna-coupled field effect transistors. We selectively activate the photo-thermoelectric detection dynamics, and we employ different dielectric configurations on SLG on Al2O3 with and without large-area CVD hBN capping to investigate their effect on SLG thermoelectric properties underpinning photodetection. With these scalable architectures, response times ~5ns and noise equivalent powers ~1nWHz-1/2 are achieved under zero-bias operation. This shows the feasibility of scalable, large-area, layered materials heterostructures for THz detection.
