10 February 2017 Study on thermally control terahertz narrow bandpass filter
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Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102500X (2017) https://doi.org/10.1117/12.2266752
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China
Abstract
In general, the terahertz metamaterial filter based on the complementary structure mainly has the fixed resonant frequency and asymmetric resonant frequency edges. In this paper, a thermally control terahertz narrow bandpass filter consisting of a periodic array of complementary wires embedded with thermosensitive semiconductor indium antimonide (InSb) has been proposed. Due to the structure of the filter is relatively simple, it can be more easily fabricated by lithograph technology compared with traditional terahertz metamaterial filter structure. Furthermore, its performance has also been analyzed based on the effective medium theory and the Drude model. The results show that the resonant frequency shifts from 1.16THz to 2.11THz with the increasing of the temperature from 160K to 360K, and the blueshift of resonance frequency as large as 81% can be implemented. Meanwhile, the reflectivity at the resonant frequency almost tends to be zero and the transmissivity spectrum at the resonant frequency exhibits sharp and symmetric edges. The filter can be applied to THz imaging system, and can effectively improve the imaging quality as a result of well characteristics of dynamic tuned filer and relatively simple structure.
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Fang Ling, Fang Ling, Renshuai Huang, Renshuai Huang, Qinglong Meng, Qinglong Meng, Weili Li, Weili Li, Bin Zhang, Bin Zhang, } "Study on thermally control terahertz narrow bandpass filter", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102500X (10 February 2017); doi: 10.1117/12.2266752; https://doi.org/10.1117/12.2266752
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