AUTHOR=Ma Anchen , Zhong Renbin , Wu Zhenhua , Wang Yiqing , Yang Long , Liang Zekun , Fang Zheng , Liu Shenggang 

TITLE=Ultrasensitive THz Sensor Based on Centrosymmetric F-Shaped Metamaterial Resonators

JOURNAL=Frontiers in Physics

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.584639

DOI=10.3389/fphy.2020.584639

ISSN=2296-424X

ABSTRACT=<p>An ultra-high sensitive metamaterials absorption sensor based on centrosymmetric double F-shaped metal resonators (CDFMR) is proposed, and its application in terahertz is analyzed. The sensor achieved perfect narrow-band absorption spectrum at 5.92 THz, with a high Q factor of 49.6. The resonance frequency is sensitive to the refractive index of the surface analyte, ultra-high sensitivity of 1,800 GHz/RIU and Fom value of 15 have been achieved. In addition, with a typical biomedical analyte of <italic>n</italic> = 1.3, the thickness sensitivity is 134 GHz/μm. It has important application in THz ultrasensitive biomedical sensor and detector.</p>