Preparation of Highly Efficient Polymeric Photorefractive Composite Containing an Isophorone-Based NLO Chromophore

Chun, Hyunaee; Moon, In Kyu; Shin, Dongho; Kim, N.

doi:10.1021/cm000913s

Cited by 82 publications

(60 citation statements)

References 21 publications

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“…The photoconducting polymer, poly[methyl-3-(9-carbazolyl)propylsiloxane] (PSX-Cz), and the nonlinear optical chromophore, 2-{3-[(E)-2-(dibutylamino)-1-ethenyl]-5,5-dimethyl-2-cyclohexenyliden} malononitrile (DB-IP-DC), were synthesized using a methodology reported elsewhere. 15,16 TNFM was purchased from Kanto Chemistry Co. and used after purification by vacuum sublimation. Figure PSX-Cz (69 wt %), DB-IP-DC (30 wt %), and TNFM (1 wt %) was dissolved in 1,2-dichlorobenzene for the PR composite.…”

Section: Methodsmentioning

confidence: 99%

Coherence Gated Three-dimensional Imaging System using Organic Photorefractive Holography

Hwang¹,

Choi²,

Kim³

et al. 2014

Bulletin of the Korean Chemical Society

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This paper discusses a coherence-gated three-dimensional imaging system based on photorefractive holography, which was applied to imaging through turbid media with a view to developing biomedical instrumentation. A rapid response photorefractive device doped with 2,4,7-trinitro-9-fluorenylidene malononitrile was used to generate the hologram grating. The estimated depth resolution was 20 µm, which corresponds to the coherence length of the light source. In this coherence imaging system, tomographic imaging of a 3-dimensional object composed of a 50 µm thick cylindrical layer was achieved. The proposed coherence imaging system using an organic photorefractive material can be used as an optical tomography system for biological applications

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Section: Methodsmentioning

confidence: 99%

Coherence Gated Three-dimensional Imaging System using Organic Photorefractive Holography

Hwang¹,

Choi²,

Kim³

et al. 2014

Bulletin of the Korean Chemical Society

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“…Furthermore, these issues tend to aggravate in light of the higher polarity of optimized ( μ 2 δ a) chromophores with regard to traditional ( μβ ) chromophores (see Table 4 ). [ 170 ] 45 DMNPAA, [ 62 ] 46 DMNPAPOE, [ 171 ] 47 DMNPAPBE, [ 171 ] 48 DMNPAPhBUE, [ 171 ] 49 7-DCST, [ 46 ] 50 PDCST, [ 29,46 ] 51 AODCST, [ 46 ] 52 DEANST, [ 115 ] 53 F-DEANST, [ 82,162 ] 54 DB-IP-DC, [172,173] 55 NPEMI-A, [ 174 ] 56 NPEMI-E, [ 174 , 175 ] 57 H1, [ 176 ] 58 H2, [ 176 ] 59 DANS, [ 168 , 165 ] 60 DBA-TCP, [ 177 ] 61 DBP-TCP, [ 177 ] 62 IDOP-20, [ 162 ] 63 ATOP-1, [162,166,178] 64 ATOP-4, [ 162,179 ] 65 DHADC-MPN, [86,180] 66 , [ 181 ] 67 .…”

Section: Chromophore Containing Pr Compositesmentioning

confidence: 99%

Organic Photorefractive Materials and Applications

2011

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This review describes recent advances and applications in the field of organic photorefractive materials, an interesting area in the field of organic electronics and promising candidate for various aspects of photonic applications. We describe the current state of knowledge about the processes involved in the formation of photorefractive gratings in organic materials and focus on the chemical and photo‐physical aspects of the material structures employed in low glass‐transition temperature amorphous composites and organic photorefractive glasses. State‐of‐the art materials are highlighted and recent demonstrations of photonic applications relying on the reversible holographic nature of the photorefractive materials are discussed.

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“…2-(3,5,5-Trimethyl-2-cyclohexenyliden) malonitrile (10 g, 0.0536 mol) was dissolved in 1-(dimethoxymethyl)-piperidine (20 mL). 7 The mixture was stirred at ambient temperature for 30 min and then 110 C for 3 h under nitrogen atmosphere. After the reaction mixture was cooled to room temperature, the volatile components were removed using a rotary evaporator and the dark-red residue was obtained.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…PSX-CZ shows good compatibility with organic materials and high optical clarity. 7 Its T g is around 51…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

Application to Optically Controlled Spatial Light Modulator Using Organic Photorefractive Composite

Joo

Kim

2004

Polym J

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ABSTRACT:Optically controlled spatial light modulator was demonstrated as application of photorefractive polymeric material. Photorefractive composites based on photoconducting carbazole-substituted polysiloxane matrix (PSXCz) show an excellent stability against phase separation, compared to poly(N-vinyl carbazole) based composite. 2-[3-[(E)-2-(piperidino)-1-ethenyl]-5,5-dimethyl-2-cyclohexenyliden] malononitrile (P-IP-DC) has large dipole moment and large polarizability anisotropy. A photorefractive sample in which a chromophore (P-IP-DC) was dispersed showed a high diffraction efficiency of 85% at an external field of 28 V/mm. Application of photorefractive material for the optically controlled spatial light modulator which can convert incoherent optical image imposed in Xe-lamp light into coherent image in He-Ne laser wavelength is demonstrated using this composite. [DOI 10.1295/polymj.36 Photorefractive effect refers to a spatial modulation of refractive index of materials which possess both photoconductivity and optical nonlinearity simultaneously.1,2 As two coherent beams intersect a photorefractive material, the internal space-charge field is formed due to redistribution of photogenerated charges, which subsequently modulate refractive index of the material via an electro-optic effect. The polymeric photorefractive materials with low glass transition temperature exhibit two attractive features, the large refractive index modulation (up to the order of 10 À2 ) and the optical erasabilility of recorded holographic information. These advantages make the organic photorefractive material to become one of the most promising candidates for optical information processing, e.g., pattern recognition and fingerprint verification. [3][4][5] Especially, photorefractive polymeric composites with carbazole-substituted polysiloxane matrix (PSX-Cz) show low glass transition temperature (T g ) and excellent stability against phase separation, comparing to poly(N-vinyl carbazole) (PVK) that has been most widely used as photoconducting matrix in the photorefractive composite. The former reduces amount of the plasticizer used for lowering the glass transition temperature of the composite to the room temperature. The latter enables to use almost all kinds of chromophore in the preparation of photorefractive composite and enhances long term stability.There are two representative factors, the magnitude of space-charge field and the electro-optic coefficient, in the steady state performance of the photorefractive material. To achieve the higher diffraction efficiency or gain coefficient of the material, the higher magnitude of space-charge field and electro-optic coefficient are necessary. The measurement method for magnitude of the space-charge field was proposed for the first time by 8 So far the diffraction efficiency (or gain coefficient) was mainly discussed to evaluate the steady state performance of the photorefractive material, whereas the magnitude of space-charge field was not often used in spite of its importance. It ...

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Preparation of Highly Efficient Polymeric Photorefractive Composite Containing an Isophorone-Based NLO Chromophore

Cited by 82 publications

References 21 publications

Coherence Gated Three-dimensional Imaging System using Organic Photorefractive Holography

Coherence Gated Three-dimensional Imaging System using Organic Photorefractive Holography

Organic Photorefractive Materials and Applications

Application to Optically Controlled Spatial Light Modulator Using Organic Photorefractive Composite

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