Development of Multiple Fano-Resonance-Based All-Dielectric Metastructure for High-Contrast Biomedical Applications

Abstract

In this paper, an all-dielectric metastructure-based high-contrast refractive index sensor is proposed. This structure can be utilized to detect various concentrations of glycerol-water mixtures by evaluating transmission spectral lines and resonant wavelength shifts related with liquid concentration detection. The experimental and calculated results of the developed sensor structure are able to excite three resonance peaks, demonstrating that the structure is capable of reaching excellent sensing capabilities. It has been established that this work has the potential to be useful in medical and biological detection; this is of great scientific and practical significance.

Multi-function sensing applications based on high Q-factor multi-Fano resonances in an all-dielectric metastructure

“…The calculated S of three Fano resonances are 254.6 nm/RIU, 176.9 nm/RIU, and 255.1 nm/RIU, as well as FOM values reach 943 RIU -1 ,109 RIU -1 and 1876 RIU -1 . The designed metastructure is also suitable for detecting liquids with refractive indexes in the range of 1.3-1.5, such as sucrose solution ( ) [ 22 ], water ( ) [ 26 ], glycerin ( ) [ 26 ], NaCl ( ) [ 38 ], ethanol ( ) [ 39 ], carbon tetrachloride ( ) [ 40 ], which is widely used in sensing fields. In particular, the proposed structure can be used to measure different blood group components.…”

“…Due to significant near-field enhancement and narrow spectral characteristics, high Q-factor Fano resonance is extensively applied in high-performance sensors [ 25 , 26 ]. Liao et al proposed a temperature sensor based on a grating-like metastructure, which achieved the maximum Q-factor of 4400 and the maximum sensitivity of 68.7 pm/°C [ 27 ].…”