title: Graded photonic quasicrystals.
abstract: We introduce graded photonic quasicrystals and investigate properties of such structures on the example of a Luneburg lens based on a dodecagonal photonic quasicrystal. It is shown that the graded photonic quasicrystal lens has better focusing properties as compared with the graded photonic crystal lens in a frequency range suitable for experimental realization. The proposed graded photonic quasicrystals can be used in optical systems where compact and powerful focusing elements are required.
authors: Image Processing Systems Institute of the Russian Academy of Sciences, 151 Molodogvardeiskaya Street, Samara 443001, Russia. dyachenko@ssau.ru
authors: Pavel N
authors: PN
authors: Dyachenko
authors: Vladimir S
authors: VS
authors: Pavelyev
authors: Victor A
authors: VA
authors: Soifer