Photonic crystals
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Cites background from "Photonic crystals"
...The optical properties of spatially periodic dielectric structures called photonic crystals have recently attracted much interest [157,158]....
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Cites background from "Photonic crystals"
...The bandgap is usually characterized by three parameters: the position of the midgap (lmin), the width of the gap (Dl) or the gap/midgap ratio (Dl/lmin), and the maximum attenuation of the gap (10 log(Imax/Imin) in the unit of dB) [92]....
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...A complete (or full, true) gap is defined as one that extends throughout the entire Brillouin zone in the photonic band structure.([92]) An incomplete one is often referred to as a pseudo gap (or the so-called stop bandgap), because it only shows up in the transmission spectrum along a certain propagation direction....
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...A PBG crystal (or photonic crystal) is a spatially periodic structure fabricated from materials having different dielectric constants.([92]) It can influence the propagation of electromagnetic waves in a similar way as a semiconductor does for electronsÐthat is, there exists a bandgap that excludes the passage of photons of a chosen range of frequencies (Fig....
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