Fast Room-Temperature Detection of Terahertz Quantum Cascade Lasers with Graphene-Loaded Bow-Tie Plasmonic Antenna Arrays
Fast Room-Temperature Detection of Terahertz Quantum Cascade Lasers with Graphene-Loaded Bow-Tie Plasmonic Antenna Arrays
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DOI：
10.1021/acsphotonics.6b00405
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发表时间：
2016-10-01
期刊：
影响因子：
7
通讯作者：
Ritchie, David A.
中科院分区：
文献类型：
--
作者：
Degl'Innocenti, Riccardo;Xiao, Long;Ritchie, David A.
本文提出了一种基于交叉指状蝶形天线与石墨烯接触的快速室温太赫兹探测器。通过使用具有不同功函数的两种金属作为与石墨烯接触的蝴蝶结天线的臂，实现了高效的光电探测。蝴蝶结阵列的制造，以提高响应度和耦合的入射光的检测器，实现一个有效的成像系统。该器件已被表征和测试与太赫兹量子级联激光器发射在单一频率约2太赫兹，产生类似的响应度为34 μ A/W和类似的噪声等效功率为1.5 × 10（-7）W/Hz（1/2）。
We present a fast room-temperature terahertz detector based on interdigitated bow-tie antennas contacting graphene. Highly efficient photodetection was achieved by using two metals with different work functions as the arms of a bow-tie antenna contacting graphene. Arrays of the bow-ties were fabricated in order to enhance the responsivity and coupling of the incoming light to the detector, realizing an efficient imaging system. The device has been characterized and tested with a terahertz quantum cascade laser emitting in single frequency around 2 THz, yielding a responsivity of similar to 34/mu A/W and a noise equivalent power of similar to 1.5 X 10(-7) W/Hz(1/2).