Optically controlled image storage in azobenzene liquid-crystalline polymer films

Wang, C.; Fei, H.; Xia, Jie; Yang, Yu; Zhan, Wei; Yang, Qian; Sun, Genban

doi:10.1007/s003400050753

Cited by 15 publications

(3 citation statements)

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“…Azobenzenes are a family of compounds that has found wide use because of their facile photoisomerization and relatively high barrier to thermal (ground state) isomerization. These properties are of potential utility in the development of molecular-scale information storage and optical switching strategies. − Among the key issues under investigation for the azobenzenes is the ability of substitution about their aromatic rings to mediate their optical properties and isomerization behavior. While it is typically assumed that the linear optical response and isomerization behavior of these chromophores are linked, this relationship has not been established.…”

Section: Introductionmentioning

confidence: 99%

Effect of Positional Substitution on the Optical Response of Symmetrically Disubstituted Azobenzene Derivatives

Blevins

Blanchard

2004

J. Phys. Chem. B

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We have synthesized a series of symmetrically substituted p-diamidoazobenzenes, and we compare their steady-state and time-resolved responses to those of p-diaminoazobenzene and azobenzene. Our experimental and computational data indicate that the identity of the azobenzene ring substituent plays a significant role in determining the ordering of excited electronic states and the oscillator strengths for the various S n r S 0 transitions. We find experimentally that the symmetric disubstitution of azobenzenes also influences the S 0 isomerization surface, with the largest S 0 barrier being found for the unsubstituted compound and the smallest barrier for p-diaminoazobenzene. We understand these data in the context of the relative electron-donating character of the para side groups.

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Section: Introductionmentioning

confidence: 99%

Effect of Positional Substitution on the Optical Response of Symmetrically Disubstituted Azobenzene Derivatives

Blevins

Blanchard

2004

J. Phys. Chem. B

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“…In recent years, azobenzene side-chain liquid-crystalline polymers have been found to be attractive, owing to their large photoinduced birefringence and long-term optical storage. An azobenzene liquidcrystalline polymer film with a thickness of about 10 μm was employed as the polarization sensitive recording medium, which was the same as our previous publications [32,33] The photoinduced anisotropy of azobenzene-containing polymers has been postulated to result from the photoinduced reorientation of the azobenzene chromophores that are aligned perpendicular to the polarization of the incident laser beam. A polarization grating with high diffraction efficiency of 31.8% was reported for image storage in this recording medium [34].…”

Section: A Experimentsmentioning

confidence: 99%

Polarization-controlled images based on double-exposure polarization holography in an azobenzene liquid-crystalline polymer

Zeng¹,

Wang²,

Zhao³

et al. 2014

Appl. Opt.

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Polarization-controlled optical image operations were demonstrated based on the double-exposure polarization holographic method. Two images were stored in the same volume of an azobenzene liquid-crystalline polymer by recording superimposed holograms, a pair of polarization gratings with one spatial frequency, using two orthogonal circularly polarized 532 nm beams and were reconstructed with a 650 nm laser. The recorded polarization holographic gratings were investigated to show distinctive polarization selectivity, high diffraction efficiency, and good stability. The brightness and the polarization of the diffracted images were found to be dependent on the polarization of the readout beam, and two images could be reconstructed individually or simultaneously.

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“…In recent years, nonlinear optical effects in organic materials have become more interesting because of their useful applications in integrated optics, such as optical modulation, all‐optical switching and optical information processing, and optical memory 1–4…”

Section: Introductionmentioning

confidence: 99%

Photoinduced birefringence properties of poly‐Schiff bases containing triphenylamine

Niu

Huang

Bai

et al. 2004

J of Applied Polymer Sci

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Anisotropy was induced in poly-Schiff bases containing triphenylamine with linearly polarized light at 488 nm. Both writing and relaxation processes were described with a biexponential function. The alignment process involved two response modes: a fast response mode and a slow one. The fast response mode was associated with angular-dependent trans-cis photoisomerization, whereas the slow one was attributed to the position adjustment of the rigid main chains used to obtain well-aligned monodomains. The writing rate increased with an increase in the light intensity at a low intensity of the irradiation light. Structural factors such as main-chain rigidity seemed to play important roles in the remaining stored information. The two polymers had large photoinduced birefringence values (0.01 and 0.0015, respectively).

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Optically controlled image storage in azobenzene liquid-crystalline polymer films

Cited by 15 publications

References 0 publications

Effect of Positional Substitution on the Optical Response of Symmetrically Disubstituted Azobenzene Derivatives

Effect of Positional Substitution on the Optical Response of Symmetrically Disubstituted Azobenzene Derivatives

Polarization-controlled images based on double-exposure polarization holography in an azobenzene liquid-crystalline polymer

Photoinduced birefringence properties of poly‐Schiff bases containing triphenylamine

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