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Organic Photorefractive Materials and Applications

“…This corresponds to a 44 times faster response compared to high-T g organic PR materials doped with carbon nanotubes (CNT) under the same conditions and wavelength. [ 116 ] Further extension of the operation of all-organic PR composites to the important telecommunication wavelength of λ = 1550 nm were enabled by the use of 10 wt.% DBM as a twophoton-absorption (TPA) sensitizer. Following an initial report on TPA by a chromophore in a PVK-based composite at 650 nm 130 fs illumination, [ 117 ] gratings were written at 1550 nm in the PATPD/7-DCST/DBM-composite using an optical parametric amplifi er, pumped by a femtosecond Ti:sapphire laser.…”

Effect of Cyanine Dyes on Photoelectric, Nonlinear Optical and Photorefractive Properties of Composites Based on Carbon Nanotubes

“…[4,5] Thus, a necessary condition for the preparation of effective photorefractive materials from unplasticized polymers with a high T g value is the use of nanosized structures, in particular, carbon nanotubes (CNT). Photorefractive polymer composites based on non-oxidized and oxidized closed single-wall nanotubes [6][7][8][9][10][11][12] and also multiwall carbon nanotubes [13] were studied earlier.…”

The effect of cyanine dyes on photorefractive properties of composites based on carbon nanotubes

“…Then, constant field E 0 was applied. The intensity of beam 2 herewith remained unchanged, and the refractive index grew by Δn 1 = (2π/n 0 )χ (3) After this, beam 1 was switched on and interference appeared.…”

“…Earlier, PR polymer composites based on closed nonoxidized [3][4][5][6][7][8] and oxidized [9] SWCNTs, as well as multiwall carbon nanotubes (CNTs) [10] as nonlin ear optical chromophores, were studied. CNTs feature optical absorption in the near IR range up to 2000 nm, and they were also used as spectral sensitiz ers to the wavelengths of 1064 [3][4][5]10] and 1550 nm [6][7][8][9].…”

“…CNTs feature optical absorption in the near IR range up to 2000 nm, and they were also used as spectral sensitiz ers to the wavelengths of 1064 [3][4][5]10] and 1550 nm [6][7][8][9]. The PR effect at the wavelength of 1064 nm can be used in optical medical diagnostics, as living tissues are sufficiently transparent in this region [11].…”