Antireflection coatings for two-dimensional photonic crystals using a rigorous impedance definition

Lawrence, Felix J.; Botten, Lindsay C.; Dossou, Kokou B.; de Sterke, C. Martijn
September 2008
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p121114
Academic Journal
We show that no consistent scalar definition of impedance is generally possible for photonic crystals. Instead, we present a rigorous semianalytic matrix definition of impedance for square lattice photonic crystals, defined in terms of Bloch modes. We then apply our definition to design a range of multilayer photonic crystal antireflection coatings efficiently.


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