Wang Lei, Zhai Shen-Qiang, Wang Feng-Jiao, Liu Jun-Qi, Liu Shu-Man, Zhuo Ning, Zhang Chuan-Jin, Wang Li-Jun, Liu Feng-Qi, Wang Zhan-Guo
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, University of Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, P.O. Box 912, Beijing, 100083, People's Republic of China.
Nanoscale Res Lett. 2016 Dec;11(1):536. doi: 10.1186/s11671-016-1749-2. Epub 2016 Dec 1.
The design, fabrication, and characterization of a polarization-dependent normal incident quantum cascade detector coupled via complementary split-ring metamaterial resonators in the infrared regime are presented. The metamaterial structure is designed through three-dimensional finite-difference time-domain method and fabricated on the top metal contact, which forms a double-metal waveguide together with the metallic ground plane. With normal incidence, significant enhancements of photocurrent response are obtained at the metamaterial resonances compared with the 45° polished edge coupling device. The photocurrent response enhancements exhibit clearly polarization dependence, and the largest response enhancement factor of 165% is gained for the incident light polarized parallel to the split-ring gap.
本文介绍了一种在红外波段通过互补开口环超材料谐振器耦合的偏振相关垂直入射量子级联探测器的设计、制造和特性。超材料结构通过三维时域有限差分法设计，并制造在顶部金属接触上，该接触与金属接地平面一起形成双金属波导。垂直入射时，与45°抛光边缘耦合器件相比，在超材料谐振处获得了显著增强的光电流响应。光电流响应增强表现出明显的偏振依赖性，对于平行于开口环间隙偏振的入射光，获得了最大165%的响应增强因子。
