Geodesic
Optical induction of 3D refractive lattices in doubly doped LiNbO$_{3}$ photorefractive crystal
Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 2, pp. 210-216.

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The optical induction of 3D rotational symmetry refractive lattices in doubly doped photorefractive and photochromic LiNbO$_{3}$:Fe:Cu crystal by combined interferometric-mask method was performed. The method is based on the spatial light modulation by amplitude mask in the transverse plane and the use of counter-propagating beam geometry building up a Gaussian standing wave, which defines the light intensity modulation in the axial direction with half-wavelength periodicity. Masks with rotationally symmetrical structures are used in the experiment. The created intensity pattern was imparted into the LiNbO$_{3}$:Fe:Cu crystal thus creating refractive lattice with the periods of 20 – 60 $\mu$m in the radial and azimuthal directions and 266 nm in the axial direction. The refractive and dispersive properties of the recorded lattices were studied.
Keywords: photonic lattice, photorefractive and photochromic effects, lithium niobate, micro- and nano-structures. 
@article{NANO_2014_5_2_a0,
     author = {A. Badalyan and P. Mantashyan and V. Mekhitaryan and V. Nersesyan and R. Drampyan},
     title = {Optical induction of {3D} refractive lattices in doubly doped {LiNbO}$_{3}$ photorefractive crystal},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {210--216},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2014_5_2_a0/}
}
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A. Badalyan; P. Mantashyan; V. Mekhitaryan; V. Nersesyan; R. Drampyan. Optical induction of 3D refractive lattices in doubly doped LiNbO$_{3}$ photorefractive crystal. Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 2, pp. 210-216. http://geodesic.mathdoc.fr/item/NANO_2014_5_2_a0/