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Highly confined mode above the light line in a two-dimensional photonic crystal slab
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) The 2D bandstructure of a PhC consisting of a square lattice of alumina rods with refractive index and radius of , where is the period. (b) The horizontal (top) and vertical (bottom) cross section of a 3D FDTD computation cell, which is the unit cell of the periodic PhC slab, containing one rod. (c) Spatial distribution of the field components at the slab/air interface (top). distribution of the transverse field components (bottom).

Image of FIG. 2.
FIG. 2.

(a) The top view of the heterogeneous cavity used in the microwave measurement. The alumina rods have a diameter of 2.4 mm and length of 48 mm. The core region has a period and the outside “walls” have a larger period perpendicular to the interface and the same period parallel to the interface. The real part of the refractive index of the alumina rods is 3.112. (b) The 2D bandstructure of the core region and the wall region along direction. (c) The spatial distribution of of the fundamental cavity mode (left) and the distribution of the transverse magnetic field and of the mode.

Image of FIG. 3.
FIG. 3.

(a) The schematic view of the microwave experiment setup. (b) The spectrum result. (c) The field distribution measured along a vertical line at point 1 shown in Fig. 2(a). (d) The field distribution measured at the top surface of the slab along line 1 shown in Fig. 2(a). In the axes of (c) and (d), is a length unit indicating the period of the PhC.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Highly confined mode above the light line in a two-dimensional photonic crystal slab