A subwavelength metal-grating assisted sensor of Kretschmann style for investigating the sample with high refractive index
Li Xu-Feng1, †, , Peng Wei2, Zhao Ya-Li3, Wang Qiao2, Wei Ji-Lin1
       

(a) The sensing properties of Kretschmann for h = 50 nm; (b1) and (b2) the reflectance for ns = 2 at different gap widths.