. "Fiala, Pavel" . . "P\u0159ichystalov\u00E1, H." . . "Photorefractive materials are recording media that can be used for holographic recording. In our contribution, an experimental study of the photorefractive effect in poly(N-vinyl carbazole) (PVK) with N-ethylcarbazole (ECZ) doped with new nonlinear optical chromophores 4-Nitro-2'-acetylamino-4'-(N,N-dimethylamino)azobenzene or 4-Cyano-4'-(N,N-diethylamino)azobenzene is presented. These two chromophores are sensitive enough to the wavelength 532 nm, so no sensitizers are needed. Using the materials, we have demonstrated four-wave mixing experiments with visible laser beams at a room temperature with using a high voltage power supply and without. The writing laser beam had the wavelength 532 nm and the reading laser beam 658 nm."@en . . . "Almonasy, N." . "Kv\u011Bto\u0148, Milan" . "S" . . . "D\u011Bdi\u010D, Ji\u0159\u00ED" . "Photorefractive polymer composites with new nonlinear optical chromophores for holographic record"@en . "5"^^ . "RIV/68407700:21340/13:00214915" . "Photorefractive materials are recording media that can be used for holographic recording. In our contribution, an experimental study of the photorefractive effect in poly(N-vinyl carbazole) (PVK) with N-ethylcarbazole (ECZ) doped with new nonlinear optical chromophores 4-Nitro-2'-acetylamino-4'-(N,N-dimethylamino)azobenzene or 4-Cyano-4'-(N,N-diethylamino)azobenzene is presented. These two chromophores are sensitive enough to the wavelength 532 nm, so no sensitizers are needed. Using the materials, we have demonstrated four-wave mixing experiments with visible laser beams at a room temperature with using a high voltage power supply and without. The writing laser beam had the wavelength 532 nm and the reading laser beam 658 nm." . . "Photorefractive polymer composites with new nonlinear optical chromophores for holographic record"@en . "21340" . . . "96128" . "Photorefractive polymer composites with new nonlinear optical chromophores for holographic record" . . . . "Photorefractive polymer composites with new nonlinear optical chromophores for holographic record" . . . "3"^^ . . "Photorefractive polymers; nonlinear recording materials; electro-optic effect; optical holography"@en . . . "RIV/68407700:21340/13:00214915!RIV14-MSM-21340___" . "[6820AEB9C9D1]" .