Optical properties of photonic crystal slabs with asymmetrical unit cell

Details Optical properties of photonic crystal slabs with asymmetrical unit cell Optical properties of photonic crystal slabs with asymmetrical unit cell

2004-02-28

arxiv.org/abs/cond-mat/0403010v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 2 Postscript figures

Scientific paper

10.1103/PhysRevB.72.045138

Using the unitarity and reciprocity properties of the scattering matrix, we analyse the symmetry and resonant optical properties of the photonic crystal slabs (PCS) with complicated unit cell. We show that the reflectivity is not changed upon the 180deg-rotation of the sample around the normal axis, even in PCS with asymmetrical unit cell. Whereas the transmissivity becomes asymmetrical if the diffraction or absorption are present. The PCS reflectivity peaks to unity near the quasiguided mode resonance for normal light incidence in the absence of diffraction, depolarisation, and absorptive losses. For the oblique incidence the full reflectivity is reached only in symmetrical PCS.

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