Recent development of conception of trapped modes in low-loss all-dielectric metamaterials

Bio-Sensor Based on Trapped Mode All-Dielectric Metasurface Coated with Graphene Layer to Enhance Sensitivity

“…We compare the resonant state in the transmission spectrum and find that the proposed metasurface-based platform is ultra-sensitive to the surrounding environment and exhibits excellent bio-sensing performance. Our study demonstrates that the particles in the metasurface serve as independent dielectric resonators, supporting a set of electrical and magnetic modes [22]. The proposed hybrid structure reveals that the all-dielectric metasurfaces coated with graphene have natural advantages for sensory applications.…”

“…Thus, the silicon meta-atom exhibits asymmetry relative to the lines drawn through their center parallel to the x-axis, whereas it is still symmetrical along the y-axis. The silicon materials are magnetically lossless with a permittivity of εd = 12.11, and the monolayer graphene-coated on the cylindrical array of the silicon particles has a thickness of 0.34 nm [22]. The thin quartz substrate (thin relative to the wavelength of an incident wave) with a permittivity of εs =2.19 and thickness hs = 100 nm is located beneath the silicon layer.…”