Polarisation-sensitive holographic recording in polyimide-containing azo-dye

Sęk, Danuta; Schab‐Balcerzak, Ewa; Solyga, M.; Miniewicz, Andrzej

doi:10.1016/s0379-6779(01)00603-8

Cited by 17 publications

(6 citation statements)

References 14 publications

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“…There have been many grating inscription studies for azo-benzene derivatives such as DR1 and polymers with azo-benzene type side chains [13][14][15][16][17][18][19]. In order to compare our grating performance to others, we made the two-wavelength experiment for DR1 and NACzHexOH, which just differs in alkyl substituent from NACzEtOH (EtOH to hexanol).…”

Section: Resultsmentioning

confidence: 99%

“…Photoisomerization and succeeding molecular motion in azo derivatives can be easily induced in polymer matrices, and various diffraction effects have been observed [16][17][18][19]. Although these results have been distinguished from the photorefractive phenomena that require broken centrosymmetry, some recent studies apparently showed one-way energy transfer, which was forbidden by theoretical considerations.…”

Section: Introductionmentioning

confidence: 99%

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Photoinduced grating formation in a polymer containing azo-carbazole dyes

et al. 2012

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Although some azo-carbazole derivatives attached on or doped into inert polymers are known to show photorefractive effect without external electric field, the origin of their asymmetric energy transfer in two-beam coupling experiments were unknown. We made the two-beam coupling experiment followed by sample translation and one-beam diffraction at 633 nm for thick films composed of 3-[(4-nitrophenyl)]azo-9H-carbazole-9-ethanol (NACzEtOH) and poly(methylmethacrylate), finding that photoinduced gratings grew in several minutes accompanied with phase displacement of the gratings, but the phase shift was not always synchronized with the refractive index modulation. We reformulated the Kogelnik's coupled-wave theory with strict energy conservation law for analysis. Comparison of the grating growth and erasure at 532 nm to Disperse Red 1 (DR1), the most well-known azo dye showed that the photoisomerization was dominant at this wavelength and that the azo-carbazole dyes were faster in response time and more resistive to erasure than DR1.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoinduced grating formation in a polymer containing azo-carbazole dyes

et al. 2012

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“…(1) and (2)), a common pseudostilbene-type molecule in a variety of optical applications. Despite various experimental studies [9,[14][15][16][17][18] containing DR1-like molecules, only few theoretical studies [19] have been published. We start by presenting a comprehensive DFT-study on trans -DR1, continue by investigation of the photoisomerisation in a more explorative fashion and finish with an extensive discussion on dimerisation of DR1.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure and Absorpti on Spectrum of Disperse Red 1: Comparison of Computational Approaches

Ojanen¹,

Rantala²

2009

TOCPJ

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An azobenzene molecule Disperse Red 1 with strongly delocalised frontier orbitals has been studied with a number of density-functional theory (DFT) related approaches. The purpose is twofold: to interpret observed photoabsorption and to compare the performance of various DFT-based approximations. The planarity of the vacuum conformation of the lower energy trans conformation is found to be significantly distorted when transformed to the higher energy cis conformation, and both isomers are found to absorb in the experimentally observed wavelengths in solutions. A common feature in both is essentially forbidden lowest energy absorption because of a negligible overlap of HOMO and LUMO due to symmetry unmatch. We find the time-dependent DFT to be the best approach for quantitative evaluation of photoabsorption energies and intensities, whereas Kohn-Sham eigenenergies and orbitals give good description only qualitatively. Isomerisation and dimerisation energetics have also been evaluated, and trans dimers have found to be up to 1 eV per molecule more stable than single molecules.

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“…Research on photochromic polyimides is aimed at three principal directions of potential applications: (i) as recording media for holographic data storage [13][14][15][16][17][18], (ii) as alignment layers in LC devices [19][20][21][22][23][24] (because the photoalignment technique has the potential to replace the conventional rubbing method) and (iii) for second-order nonlinear optics i.e. electro-optical modulation, optical switching, and second harmonic generation [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

New photochromic polyimides

Schab‐Balcerzak

Sapich²,

Hass

et al. 2005

SPIE Proceedings

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A series of new polyesterimides (PEIs) containing photochromic azobenzene moieties have been synthesized. For this purpose the following diesterdianhydrides with azobenzene groups have been prepared: 2,2'-{4-[(4-nitrophenyl)-azo} phenyl]iminobis(ethyl benzene-1,2-dicarboxylic acid anhydride-4-carboxylate), 2,2'-{4-[(4-methylphenyl)-azo}phenyl] iminobis(ethyl benzene-1,2-dicarboxylic acid anhydride-4-carboxylate) and 2,2'-{4-[(4-fluorophenyl)-azo}phenyl] iminobis(ethyl benzene-1,2-dicarboxylic acid anhydride-4-carboxylate). The polyesterimides have been obtained from diesterdianhydrides and 1,3-phenylenediamine using high-temperature polycondensation. The resulting polyimides are characterized as having good solubility in some solvents, high glass transition temperatures (168-210°C) and good film forming properties. The irradiation with linearly polarized light causes a reorientation of the azobenzene groups by angular-selective E/Z photoisomerization. In this way optical anisotropy is induced in the initially isotropic films casting from solution of the amorphous polymers. The photoinduced dichroism in the films has been measured to investigate the effect of azobenzene substitution.

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Polarisation-sensitive holographic recording in polyimide-containing azo-dye

Cited by 17 publications

References 14 publications

Photoinduced grating formation in a polymer containing azo-carbazole dyes

Photoinduced grating formation in a polymer containing azo-carbazole dyes

Electronic Structure and Absorpti on Spectrum of Disperse Red 1: Comparison of Computational Approaches

New photochromic polyimides

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