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  • A spatial quantum model of spontaneous parametric down-conversion in nonlinear layered structures is developed expanding the interacting vectorial fields into monochromatic plane waves. A two-photon spectral amplitude depending on the signal- and idler-field frequencies and propagation directions is used to derive transverse profiles of the emitted fields as well as their spatial correlations. Intensity spatial profiles and their spatial correlations are mainly determined by the positions of transmission peaks formed in these structures with photonic bands. A method for geometry optimization of the structures with respect to efficiency of the nonlinear process is suggested. Several structures composed of GaN/AlN layers are analyzed as typical examples. They allow the generation of photon pairs correlated in several emission directions. Photon-pair generation rates increasing better than the second power of the number of layers can be reached. Also structures efficiently generated photon pairs showing anti-bunching and anti-coalescence can be obtained. Three reasons for splitting the correlated area in photonic-band-gap structures are revealed: zig-zag movement of photons inside the structure, spatial symmetry and polarization-dependent properties. Also spectral splitting can be observed in these structures.
  • A spatial quantum model of spontaneous parametric down-conversion in nonlinear layered structures is developed expanding the interacting vectorial fields into monochromatic plane waves. A two-photon spectral amplitude depending on the signal- and idler-field frequencies and propagation directions is used to derive transverse profiles of the emitted fields as well as their spatial correlations. Intensity spatial profiles and their spatial correlations are mainly determined by the positions of transmission peaks formed in these structures with photonic bands. A method for geometry optimization of the structures with respect to efficiency of the nonlinear process is suggested. Several structures composed of GaN/AlN layers are analyzed as typical examples. They allow the generation of photon pairs correlated in several emission directions. Photon-pair generation rates increasing better than the second power of the number of layers can be reached. Also structures efficiently generated photon pairs showing anti-bunching and anti-coalescence can be obtained. Three reasons for splitting the correlated area in photonic-band-gap structures are revealed: zig-zag movement of photons inside the structure, spatial symmetry and polarization-dependent properties. Also spectral splitting can be observed in these structures. (en)
Title
  • Spatial properties of entangled photon pairs generated in nonlinear layered structures
  • Spatial properties of entangled photon pairs generated in nonlinear layered structures (en)
skos:prefLabel
  • Spatial properties of entangled photon pairs generated in nonlinear layered structures
  • Spatial properties of entangled photon pairs generated in nonlinear layered structures (en)
skos:notation
  • RIV/61989592:15310/11:33138360!RIV12-MSM-15310___
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  • P(1M06002), P(ED2.1.00/03.0058), P(OC09026)
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  • N
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  • 231192
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  • RIV/61989592:15310/11:33138360
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  • photon pairs, nonlinear layered structures (en)
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  • US - Spojené státy americké
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  • [9576D2933854]
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  • Physical Review A
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  • 84
http://linked.open...iv/tvurceVysledku
  • Peřina, Jan
http://linked.open...ain/vavai/riv/wos
  • 000297292700015
issn
  • 1050-2947
number of pages
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  • 10.1103/PhysRevA.84.053840
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  • 15310
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