Yuyao Chen, Haoran Zhou, Xiaochao Tan, Shun Jiang, Ao Yang, Junyu Li, Mingming Hou, Qiushi Guo, Shao-Wei Wang, Feng Liu, Huan Liu, Fei Yi
https://ieeexplore.ieee.org/document/8370898/
The detection of terahertz electromagnetic waves is crucial for emerging applications within this frequency band, such as spectroscopy, imaging and communication. Extending the well-developed uncooled infrared focal plane array technology to terahertz frequency regime would be very attractive, but high absorption in the terahertz region with a subwavelength pixel is necessary. In this paper, we proposed a meander line nanoantenna(MLNA) absorber with a metal-insulator-metal structure for sub-wavelength terahertz absorption. 89% absorption is achieved at the wavelength of 155 μm with a 10 μm pitch size. The MLNA absorber is polarization insensitive and can maintain a high absorption when the incident angle is within 40 degrees. We expect that the proposed MLNA absorber can be integrated with the small pixels of uncooled infrared focal plane array for terahertz detection.
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