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Metallic metamaterial terahertz sensors for simultaneous measurement of temperature and refractive index

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Abstract

A new type of sensor based on metamaterials, consisting of an array of metal rings on a quartz substrate, is proposed to measure temperature and refractive index simultaneously. Simulations of the transmission spectrum show two dips, both of which vary with the refractive index and temperature of the environment. The sensitivities of the two dips to refractive index are 67.9 GHz/RIU and 142.76 GHz/RIU, respectively, and to temperature are 6.35 MHz/K and 7.14 MHz/K, respectively. These small, highly sensitive sensors have wide application prospects as physical, biological, and chemical sensors. They simultaneously measure temperature and refractive index in the terahertz band.

© 2020 Optical Society of America

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