High-Speed Carbon Nanotube Photodetectors for 2 μm Communications.
High-Speed Carbon Nanotube Photodetectors for 2 μm Communications.
复制标题
DOI：
10.1021/acsnano.3c04619
复制
发表时间：
2023-07
期刊：
影响因子：
17.1
通讯作者：
Wei Wu;Hui Ma;Xiang Cai;Bing Han;Yan Li;Ke Xu;Hongtao Lin;Fan Zhang;Zhangyuan Chen;Zhiyong Zhang;L. Peng;Sheng Wang
中科院分区：
文献类型：
--
作者：
Wei Wu;Hui Ma;Xiang Cai;Bing Han;Yan Li;Ke Xu;Hongtao Lin;Fan Zhang;Zhangyuan Chen;Zhiyong Zhang;L. Peng;Sheng Wang
在大数据时代，对数据传输容量的需求不断增长，要求通信频段从传统的光通信窗口（1.3-1.6 μm）扩展到2 μm频段（1.8-2.1 μm）。然而，目前2 μm窗口的高速光电探测器的最大带宽（~ 30 GHz）远小于基于III-V族材料或锗的1.55 μm波段光电探测器（>100 GHz）。在这里，我们展示了一个高性能的碳纳米管（CNT）光电探测器，可以工作在2和1.55 μm的波长波段的基础上，高密度的碳纳米管阵列在石英基板上。在2 μm波长下，CNT光电探测器具有0.62A/W的高响应度和40 GHz的大3dB带宽（设置限制）。带宽大于在该波长范围内工作的现有光电探测器的带宽。工作在1.55 μm波长的CNT光电探测器在零偏压下具有超过67 GHz的3 dB带宽。我们的工作表明，高性能、低成本的碳纳米管光电探测器在未来2和1.55 μm波段的高速光通信中具有巨大的潜力。
In the era of big data, the growing demand for data transmission capacity requires the communication band to expand from the traditional optical communication windows (∼1.3-1.6 μm) to the 2 μm band (1.8-2.1 μm). However, the largest bandwidth (∼30 GHz) of the current high-speed photodetectors for the 2 μm window is considerably less than the developed 1.55 μm band photodetectors based on III-V materials or germanium (>100 GHz). Here, we demonstrate a high-performance carbon nanotube (CNT) photodetector that can operate in both the 2 and 1.55 μm wavelength bands based on high-density CNT arrays on a quartz substrate. The CNT photodetector exhibits a high responsivity of 0.62 A/W and a large 3 dB bandwidth of 40 GHz (setup-limited) at 2 μm. The bandwidth is larger than that of existing photodetectors working in this wavelength range. Moreover, the CNT photodetector operating at 1.55 μm exhibits a setup-limited 3 dB bandwidth over 67 GHz at zero bias. Our work indicates that CNT photodetectors with high performance and low cost have great potential for future high-speed optical communication at both the 2 and 1.55 μm bands.