A normal incident quantum cascade detector enhanced by surface plasmons
A normal incident quantum cascade detector enhanced by surface plasmons
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DOI：
10.1063/1.4710523
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发表时间：
2012-05
影响因子：
4
通讯作者：
S. Zhai;Jun-qi Liu;Feng-qi Liu;Zhan-guo Wang
中科院分区：
文献类型：
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作者：
S. Zhai;Jun-qi Liu;Feng-qi Liu;Zhan-guo Wang
我们展示了一个正常的入射量子级联检测器的表面等离子体共振激发使用Au二维孔阵列集成在顶部的检测器的吸收区域。器件在160 K时的最大响应率为8.4 mA/W，在室温下的响应率为1.02 mA/W。与45°抛光边缘耦合器件相比，二维孔阵列在大多数温度下都能提高量子效率，在140 K时量子效率提高最大，提高了69%。
We demonstrate a normal incident quantum cascade detector excited by surface plasmons resonance using an Au two-dimensional hole array integrated on top of the detector absorption region. With normal incidence, the device has a maximal responsivity value of 8.4 mA/W at 160 K and can work up to room temperature with a responsivity of 1.02 mA/W. Compared with the 45° polished edge coupling device, the two-dimensional hole array can lead to quantum efficiency enhancement at most measured temperatures, and at 140 K the quantum efficiency is enhanced most strongly by 69%.