›› 2015, Vol. 24 ›› Issue (4): 47206-047206.doi: 10.1088/1674-1056/24/4/047206
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
杨昕昕a b, 孙建东a, 秦华a, 吕利a b, 苏丽娜c, 闫博d, 李欣幸a, 张志鹏a, 方靖岳d
Yang Xin-Xin (杨昕昕)a b, Sun Jian-Dong (孙建东)a, Qin Hua (秦华)a, Lv Li (吕利)a b, Su Li-Na (苏丽娜)c, Yan Bo (闫博)d, Li Xin-Xing (李欣幸)a, Zhang Zhi-Peng (张志鹏)a, Fang Jing-Yue (方靖岳)d
摘要: We report the fabrication and characterization of a single-layer graphene field-effect terahertz detector, which is coupled with dipole-like antennas based on the self-mixing detector model. The graphene is grown by chemical vapor deposition and then transferred onto an SiO2/Si substrate. We demonstrate room-temperature detection at 237 GHz. The detector could offer a voltage responsivity of 0.1 V/W and a noise equivalent power of 207 nW/Hz1/2. Our modeling indicates that the observed photovoltage in the p-type gated channel can be well fit by the self-mixing theory. A different photoresponse other than self-mixing may apply for the n-type gated channel.
中图分类号: (Electronic transport in graphene)