Polymeric photorefractive materials

Moerner, W. E.; Silence, S. M.

doi:10.1021/cr00025a005

Cited by 727 publications

(472 citation statements)

References 34 publications

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Section: ä23hunclassified

“…Pour les polymères, on pourra consulter avec profit l'article de revue de la référence [24] et le modèle développé en [25]. Nous avons représenté sur la figure 2.d, le schéma d'énergie en fonction d'une coordonnée d'espace associé à un polymère photoréfractif [24]. L'énergie des photons est inférieure à l'écart énergétique entre les plus hautes orbitales moléculaires occupées (highest occupied molecular Orbitals, HOMO) et les plus basses orbitales moléculaires inoccupées (lowest unoccupied molecular Orbitals, LUMO) de la chaîne principale du polymère.…”

Section: ä23hunclassified

“…Des débuts d'analyse sont proposés dans les références [24,25,37]. Ces analyses sont des adaptations du modèle de transport par les bandes que nous présentons ci-dessous pour les cristaux inorganiques.…”

Section: éQuations Du Transport De Chargeunclassified

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L'effet photoréfractif

Pauliat

Roosen

1998

l'Optique Non Linéaire Et Ses Matériaux

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Résumé : La souplesse d'emploi des matériaux photoréfractifs est un de leurs principaux attraits. Un même échantillon est sensible sur une plage de longueurs d'onde de plus de 100 nm avec des temps de réponse s'étageant de moins d'une nanoseconde à plus d'une seconde en fonction de la puissance optique mise en jeu. Cette richesse explique le succès de l'effet photoréfractif et aussi les centaines de publications annuelles sur ce sujet. De nombreux matériaux photoréfractifs aux caractéristiques très diverses sont disponibles commercialement. Bien qu'il ne soit pas possible de résumer ici l'ensemble de ces résultats, nous présentons les notions indispensables à la compréhension de ce phénomène nonlinéaire, à l'utilisation de ces matériaux, et au choix des échantillons. Nous n'abordons pas le vaste domaine des applications.

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Section: ä23hunclassified

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L'effet photoréfractif

Pauliat

Roosen

1998

l'Optique Non Linéaire Et Ses Matériaux

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“…Incorporating photochromic functionalities, such as azobenzene or other chromophores, into organic systems lead to photoresponsive materials. The chromophores can be covalently linked to the polymer backbone as side-groups or built into the main chain [1][2][3][4][5]. These photochromic materials are being intensively investigated with hope for their potential application as active materials in information storage devices: optical data storage [6,7] and holographic applications [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Refractive index modulation in polymeric photochromic films

Ortyl

Kucharski

2003

Open Chemistry

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Photochromic properties of methylacrylate monomers and polymers containing azobenzene groups with heterocyclic sulfonamide functionalities viz sul somidyne (4-amino-N-[2,6-dimethylpyrimidyn-4-yl]benzenesulfonamide) and sulfamethoxazole (4-amino-N-[5-methylisoxazol-3-yl]benzenesulfonamide) substituents were investigated. On illumination with light the azobenzene group underwent trans-cis isomerisation, which was manifested by a drop in the absorbance of the maximum absorption peak at ca. 450 nm and by decrease in refractive index. Quantum chemical calculations showed signi cant di¬erences in UV-VIS spectra, dipole moments, polarizability and refractive index between both cis and trans form of the chromophoric monomers. The illumination of spin-coated polymer lms during ellipsometry measurements resulted in a change in refractive index within the range of 0.014 to 0.025. The dynamics of growth and decay of refractive index changes, was described by biexponential functions approach.

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“…[1][2][3] Due to their large optical nonlinearities, low dielectric constants and low cost, polymeric photorefractive (PR) materials in particular have attracted a significant amount of attention during the past 10 years, and tremendous progress has been made in their development. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Although many dyes are well suited for visible wavelengths, none have been reported to photosensitize PR polymeric composites at the infrared wavelengths of 1.31 or 1.55 µm, commonly used in optical communications.…”

Section: Introductionmentioning

confidence: 99%

Inorganic: Organic Hybrid Nanocomposites for Photorefractivity at Communication Wavelengths

et al. 2002

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This paper reports new photorefractive polymeric nanocomposites photosensitized with HgS or PbS nanocrystals and operating at the communication wavelength of 1.3 µm. To our knowledge, it is the first report of a polymeric photorefractive medium with spectral response at a communication wavelength. The nanocomposites involving HgS are prepared by an in-situ nanochemistry approach, whereas those involving PbS were prepared using competitive nanochemistry. Photoconductivity experiments were employed in the characterization of photocharge generation quantum efficiency provided by the semiconductor nanocrystals. The photorefractive nature of the composites is confirmed using electric field dependent two-beam coupling. In the case of nanocomposite containing PbS nanocrystals, a net gain in excess of the associated absorption loss is observed.

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Polymeric photorefractive materials

Cited by 727 publications

References 34 publications

L'effet photoréfractif

L'effet photoréfractif

Refractive index modulation in polymeric photochromic films

Inorganic: Organic Hybrid Nanocomposites for Photorefractivity at Communication Wavelengths

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