Non-linear optical properties of organic materials

Williams, David J.

doi:10.1016/0040-6090(92)90879-g

Cited by 22 publications

(9 citation statements)

References 7 publications

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“…2.39). As a result, Table 2.2) and copolymers XXIV (4) the birefringence above glass transition temperatures increases to values of one order of the magnitude higher than the values of ~nind in the glassy state.…”

Section: And 23)mentioning

confidence: 82%

“…Light exposure time (a) and relaxation time (b) are indicated in the figure dye solutions and in the polymer dye mixtures were studied in a number of works [4,[90][91][92][105][106]. According to Ref [93], the appearance of photoinduced anistropy in isotropic media containing azo dyes under an illumination by a polarized light is explained by the trans-cis photo isomerization of azo dye with respect to the N=N double bond.…”

Section: And 23)mentioning

confidence: 99%

“…2.5 one can vary the connection type of dye-containing fragments widely including them in the main and the side chains as well as changing their distribution type along the macromolecule. Some types and properties of copolymers obtained by us via copolymerization, namely meso genic and azo dye-containing monomers, are shown in Tables 2.2 and 2.3. Polymers with covalent-connected dye molecules have essential advantages over polymer-dye-mixtures 4 • First of all, this concerns the solubility of dyes in a 4The properties of the mixtures of dyes and some amorphous polymers (polycarbonate, polymethylmetacrylate, polyvinyl alchohol and others) were considered a long time ago; these data can be found, for example, in [39][40][41][42]. Some of these data are discussed in chapter 1 of this book.…”

Section: Comb-shaped Dye-containing Polymers With Mesogenic Side Groupsmentioning

confidence: 99%

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

Shibaev¹,

Kostromin²,

Ivanov³

1996

Polymers as Electrooptical and Photooptical Active Media

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Section: And 23)mentioning

confidence: 82%

Section: And 23)mentioning

confidence: 99%

Section: Comb-shaped Dye-containing Polymers With Mesogenic Side Groupsmentioning

confidence: 99%

See 1 more Smart Citation

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

Shibaev¹,

Kostromin²,

Ivanov³

1996

Polymers as Electrooptical and Photooptical Active Media

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“…There is a continuing interest in developing the LB method and exploring its utility for making practical materials for nonlinear optics. 60 (3) Photocontrolled Reversible Property Changes: Azo Polymers with Relatively Stable Cis Isomers.…”

Section: Some Properties Resulting From Isomerization In Azo Polymersmentioning

confidence: 99%

Recent developments in aromatic azo polymers research

Xie¹,

Natansohn²,

Rochon³

1993

Chem. Mater.

556

408

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The photochemical and thermal cis-to-trans isomerization of aromatic azo groups covalently bonded within polymers and its practical consequences as well as some other recent applications are reviewed. The kinetics and mechanism of the isomerization of azo polymers are briefly presented, and then several recent developments in azo polymers research are discussed. They include liquid crystallinity, nonlinear optical properties, monolayer assemblies, and the lightinduced birefringence and dichroism. Some of the phase transitions of liquid-crystalline azo polymers can be induced photochemically by the azo groups isomerization. Second-order optical nonlinearity can be obtained in polymers with donorand acceptor-substituted azo groups. Using the Langmuir-Blodgett technique, azo polymer monolayers can be built and used as "command surfaces" of liquid-crystal films. The light-induced birefringence is a reorientation phenomenon which is a consequence of the trans-cis-trans isomerization. Future possible applications for a variety of practical devices, such as display devices, optical modulators, optical waveguides, holography, and reversible optical storage are mentioned.

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“…NLO active functions have been incorporated in polymer matrices in the form of low molecular weight compounds [9,10] or have been introduced in the backbone [11] and side groups [12,13] of polymers.…”

Section: Introductionmentioning

confidence: 99%

Mixed mono- and multilayers of poly(isocyanide)s with non-linear optically active side chains

et al. 1994

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Take-down policy If 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. AbstractThe properties and structure of Langmuir-Blodgett mono-and multilayers of several poly(isocyanide)s with non-linear optically active side-chains were studied. These polymers formed very rigid layers or layers which appeared to be unstable. To circumvent this problem they were mixed with other poly(isocyanide)s or with amylose-butyrate. Transmission electron microscopy studies of the polymeric mixtures revealed that phase separation occurred in all cases and that only poly(isocyanide)s substituted with hydrophilic side chains formed monomolecular layers. Depending on the nature of the polymer which was used for mixing, the dye polymers could be deposited with Y-or Z-type transfer. Second-harmonic intensities generated from these films were small in the case of the Y-type multilayered films and moderately high in the case of the Z-type films.

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Non-linear optical properties of organic materials

Cited by 22 publications

References 7 publications

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

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

Recent developments in aromatic azo polymers research

Mixed mono- and multilayers of poly(isocyanide)s with non-linear optically active side chains

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