Full text loading...
(a) In the conventional 1D case, the refractive index and the thickness h of an antireflection layer are the antireflection parameters. (b) In the 2D PC case, the radius of rods and the distance between the ARC structure and the crystal truncation are the design parameters of the ARC structure.
Schematic diagram of the PC with the ARC structure. Two acrylic plates, each with an aluminum sheet attached hold the sample vertically.
(a) Equifrequency surfaces of the 2D PC which are obtained by the plane-wave expansion method. The inset represents the cross-sectional view of the 2D square lattice PC composed of alumina rods in air. (b) Transmittance of microwaves without any ARC structure and (c) with the ARC structure applied for the frequency range of 12.1 to 12.9 GHz propagating along the direction as a function of position. The black line with rectangular points indicates the reference transmission which is measured without the PC at 12.5 GHz.
(a) Transmission spectra obtained with the 2D FDTD calculations for the PC sample with (red line) and without the ARC (black line) structure. (b) Experimentally measured transmission spectra of the PC sample which are composed of alumina rods with (red line) and without the ARC (black line) structure.
Article metrics loading...