Comb-Shaped Polymers with Mesogenic Side Groups as Electro- and Photooptical Active Media

Shibaev, Valéry; Kostromin, S. G.; Ivanov, Sergei A.

doi:10.1007/978-3-642-79861-0_2

Cited by 99 publications

(60 citation statements)

References 74 publications

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“…In photosensitive materials, linearly polarized (LP) light induces optical anisotropy via an axis-selective photoreaction. 1 To date, photoinduced molecular reorientation with a large optical anisotropy has been attained using many types of photosensitive materials, including polymeric and monomeric materials comprised of axis-selectively photoreactive moieties. [2][3][4][5][6][7] Among these materials, azobenzene-containing materials have been extensively studied due to their applicability to information storage and birefringent optical devises.…”

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confidence: 99%

“…[2][3][4][5][6][7] Among these materials, azobenzene-containing materials have been extensively studied due to their applicability to information storage and birefringent optical devises. [1][2][3][4][5][6] In the photoinduced reorientation, the azobenzene molecules reorient according to the polarization state of the light beams based on axisselective trans-cis-trans photoisomerization. Additionally, holographic exposure often results in surface relief (SR) formation due to the periodic photoisomerization of the azobenzene molecules with varying degrees of photoreaction as well as the polarization conditions of the exposure light beam.…”

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confidence: 99%

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Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Kawatsuki¹,

Matsushita²,

Kondo³

et al. 2013

Apl Materials

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The photoinduced reorientation and surface relief (SR) formation behaviors of a novel photosensitive polymer, which was transparent in visible region, were investigated using linearly polarized-313-nm light and holographic exposure with a 325-nm He-Cd laser. The polymer was comprised of photosensitive 4-methoxy-N-benzylideneaniline side groups, and exhibited a sufficient photoinduced molecular reorientation with a birefringence of 0.11. Holographic exposure generated a SR structure, which had a periodical molecular reorientation that depended on the polarization of the interference beams. The generated SR height was ∼212 nm, and the inscription of a double holographic exposure yielded a two-dimensional SR structure

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confidence: 99%

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confidence: 99%

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Kawatsuki¹,

Matsushita²,

Kondo³

et al. 2013

Apl Materials

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“…For example, potential applications are patterned polarization rotators for stereoscopic displays, optical data storage, polarization sensitive gratings or polarization sensitive recordings, and holograms for copy protection. [1][2][3][4][5][6][7] More recently, much attention is given towards local control of the alignment of liquid crystals in multidomain liquid crystal displays for the improvement of the viewing angle. [8][9][10] In general, the liquid crystal ͑LC͒ orientation can be influenced via modification of the bulk LC orientation or, indirectly, via modification of the alignment layer.…”

Section: Introductionmentioning

confidence: 99%

“…Modification of the transmission of liquid crystal layers between crossed polarizers via directly influencing the bulk orientation of liquid crystals has been shown to be possible using polarized light illumination of LC layers containing dyes. [3][4][5] The dye has to be anisotropic and photoisomerizable. Due to the absorption of light, the dye undergoes repeated trans to cis and cis to trans isomerizations.…”

Section: Introductionmentioning

confidence: 99%

Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

Witte¹,

Neuteboom²,

Brehmer³

et al. 1999

Journal of Applied Physics

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Link to publication Citation for published version (APA):Witte, van de, P., Neuteboom, E. E., Brehmer, M., & Lub, J. (1999). Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant. Journal of Applied Physics, 85(11), 7517-7521. DOI: 10.1063/1.370548 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. A method for the production of polarization sensitive recordings in liquid crystalline polymers is presented. The system is based on local modification of the twist angle of chiral nematic polymer films. The twist angle of the polymer film is varied by modifying the chemical structure of the chiral dopant. Here a photoisomerizable menthone derivative is used that has a fivefold difference in helical twisting power between the E and the Z isomer. The twist angle of the film can be varied between Ϫ90°and 0°by introducing a nonphotosensitive chiral dopant with opposite twisting sense. Complex pictures with gray scales can be recorded in the films with black and white contrasts higher than 20.

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“…There are also studies about the photochemical induced variation of the orientational and supramolecular order [20][21][22][23][24] . But up to know there is only a minimum of knowledge about the photoinduced variation of the molecular dynamics.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and photochemical behavior of amorphous comb-like copolymers with photochromic azobenzene side groups

Fritz

Schönhals²,

Sapich

et al. 1999

Macromol. Chem. Phys.

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SUMMARY: A series of amorphous photochromic homo-and copolymethacrylates with an azobenzene moiety in the side group is investigated systematically by optical and dielectric spectroscopy. The aliphatic ester component of the comonomer unit and the concentration of the azobenzene groups within the copolymer are varied. The kinetics and the temperature dependence of the E/Z (trans/cis) photoisomerization and of the thermal Z/E (cis/trans) isomerization is studied for spin-coated films of the polymers. To understand the polarity of the polymeric materials as well as the matrix dependence of the reactions and of the photoinduced reorientation processes in the steady state molecular dynamics is investigated by dielectric spectroscopy. A variety of relaxation processes is observed: a -relaxation is detected for polymers containing azobenzene moieties. The temperature dependence of the reaction rate of the thermal Z/E isomerization process measured by optical spectroscopy seems to correlate with the values of the b 9 -process. A correspondence between dielectric and photochemical behavior is discussed.

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Comb-Shaped Polymers with Mesogenic Side Groups as Electro- and Photooptical Active Media

Cited by 99 publications

References 74 publications

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

Dynamic and photochemical behavior of amorphous comb-like copolymers with photochromic azobenzene side groups

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