光电探测器
响应度
光电子学
材料科学
带宽(计算)
碳纳米管
波长
光通信
暗电流
光学
纳米技术
电信
物理
计算机科学
作者
Weifeng Wang,Hui Ma,Xiang Cai,Bing Han,Yan Li,Ke Xu,Hongtao Lin,Fan Zhang,Zhangyuan Chen,Zhiyong Zhang,Lian‐Mao Peng,Sheng Wang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-07-20
卷期号:17 (15): 15155-15164
被引量:2
标识
DOI:10.1021/acsnano.3c04619
摘要
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.
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