期刊
ADVANCED OPTICAL MATERIALS
卷 11, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202203123
关键词
Fano-Feshbach resonances; metamaterials; metasurfaces; plasmonics; metasensors
The researchers report the design of a metamaterial-based sensor capable of detecting small amounts of molecules in a medium. By accurately selecting the parameters of the metamaterial, a highly sensitive sensor was developed. This work paves the way for the development of novel devices for biomedical and environmental applications.
Metamaterials-based sensors are of primary interest in physics, materials science, medicine, and biophysics thanks to their ability to detect very tiny amount of molecules spread into a medium. Here, a metastructure utilizing the epsilon near zero (epsilon(NZ)) and Fano-Rabi physics is engineered to design a system with ultra-high sensitivity. So far, a dedicated study of such systems has been missing. In this work, the authors report the results of their efforts to fill the gap by considering a metasurface, designed as a periodical array of rings with a cross in their center, placed on top of a silver (Ag) and zinc oxide (ZnO) epsilon near-zero optical nanocavity (epsilon(NZ)-ONC) metamaterial. The accurate selection of the metasurface parameters allows the design of a sensor exhibiting an extremely high sensitivity of about 16 000 and 21 000 nm RIU-1 depending on incoming polarization. This work paves the way for the development of novel groundbreaking devices for biomedical and environmental application based on plasmonic and photonic design principles.
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