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Multifrequency spatial filtering: a general property of two-dimensional photonic crystals

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Fig. 1. (a) Different combinations of mutual location of EFCs for PhC (solid lines) and air host (dotted lines – circles) in the repeated zone diagram at fixed frequency; components of wavevector, k x and k y , are assumed to vary from −2π/a to 2 π/a (a is
Fig. 4. Maps of (a) t 0 and (b) t −1 in (ka, θ)-plane at d/a = 0.35, ε = 9.61, and N = 8; straight vertical lines – approximate boundaries of ka-ranges which can be used for bandstop (BS) and band-pass (BP) spatial filtering, dashed curve – threshold line
Fig. 5. Maps of t 0 in (ka, θ)-plane at (a) d/a = 0.5, (b) d/a = 0.55, ε = 9.61, and N = 8; straight vertical lines – approximate boundaries of ka-ranges which can be used for bandstop (BS) and low-pass (LP) spatial filtering, dashed curve – threshold line

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