منابع مشابه
Apodized photonic crystal waveguide gratings.
Apodized photonic crystal (PC) waveguide gratings are proposed to suppress sidelobes which appear in reflection spectra of usual PC waveguide gratings. By using specific functions (Gauss and Gauss-cosine functions) for the longitudinal refractive index distribution, it is possible to suppress sidelobes in the reflection spectra of PC waveguide gratings efficiently. The apodization is realized b...
متن کاملBasics of the Photonic Crystal Gratings
More than twenty years have passed since that time when the analogy between solid-state physics and optics led to the concept of photonic crystals (PCs) (Yablonovitch, 1987). Fast progress in theory and applications of PCs has been stimulated to a large extent by their unique properties that allow increasing the potential of light controlling. Slabs of PC have mainly been studied in case of lin...
متن کاملKossel diffraction and photonic modes in one-dimensional photonic crystal
Kossel diffraction under standing-wave excitation in a one-dimensional photonic crystal is investigated. It is shown that by combining the reciprocity theorem, the Fermi golden rule and the concept of density of photonic modes, it is possible to predict the behaviour of the Kossel diffraction in such a system.
متن کاملDispersion irrelevant wideband asymmetric transmission in dielectric photonic crystal gratings.
Wideband suppression of zero order and relevant strongly asymmetric transmission can be obtained in photonic crystal gratings that are made of linear isotropic materials and show the broken structural (axial) symmetry, even if zero diffraction order may be coupled to a Floquet-Bloch (FB) wave at the incidence and exit interfaces. The studied mechanism requires that the peculiar diffractions at ...
متن کاملLiquid-crystal diffraction gratings using polarization holography alignment techniques
A method of patterning surfaces for liquid-crystal alignment using a polarization holography exposure on a linear photopolymerizable polymer alignment layer is demonstrated. Three configurations are demonstrated which include registered planar-periodic surface boundary conditions on both surfaces true polarization gratings , planar-periodic and uniform planary surface boundary conditions, and p...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2001
ISSN: 1094-4087
DOI: 10.1364/oe.8.000209