Figure 5
Angularly-tuned Brewster quasi-BICs in HRI tilted-disk metasurface: experimental and theoretical spectra. Contour maps of the s-polarized reflectance R(ν,θ) intensity and phase from a square array (lattice period = 12 mm) of dielectric resonator disks (as in Fig. 2), tilted ϕ = 30° with respect to the plane normal, as a function of angle of incidence θ and frequency (GHz). (a–d) Experimental measurements of intensity with AAC and phase for a finite 11 × 11 array of disks: (a,b) reflection (excluding the non-accessible backscattering region); (c,d) zero-order contribution into transmission, removing the incident field from the total transmitted field (see Methods). (e–h) Same as in a-d, but for CEMD theoretical calculations (with AAC). (i–l) Same as in a-d, but for the iCEMD theoretical calculations for an infinite array. (m) Schematic depicting the geometry of the plane of incidence and picture of the sample.
