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Ru-jong Jeng - One of the best experts on this subject based on the ideXlab platform.

  • A novel second-order nonlinear Optical guest-host polymeric material exhibiting Optical Transparency down to 400 nm
    Polymer, 1999
    Co-Authors: Ging-ho Hsiue, Ru-jong Jeng
    Abstract:

    A guest-host system of a nonlinear Optical (NLO) arylphosphine oxide and polyhydroxystyrene (PSOH) has been investigated for second-order nonlinear optics. The synthesized NLO-active arylphosphine oxides show spectroscopic properties in accordance with the proposed structures using n.m.r. spectrometry. These NLO-active arylphosphine oxides and polymer matrix exhibit Optical Transparency down to 400 nm, and excellent thermal stability (Td > 345°C). An NLO-active chromophore with short absorption wavelength is desirable for application in frequency doubling. Moreover, the excellent thermal stability of the chromophore will prevent its decomposition during the poling process at elevated temperatures. The homogeneity of these guest-host NLO polymers are confirmed using scanning electron microscopy (SEM). The second-order nonlinearity and temporal stability of these NLO polymers were also reported. The relationship between molecular motion and temporal stability are studied by dielectric analysis.

  • A novel second-order nonlinear Optical guest-host polymeric material exhibiting Optical Transparency down to 400 nm
    Polymer, 1999
    Co-Authors: Rong Ho Lee, Ging-ho Hsiue, Ru-jong Jeng
    Abstract:

    A guest-host system of a nonlinear Optical (NLO) arylphosphine oxide and polyhydroxystyrene (PSOH) has been investigated for second-order nonlinear optics. The synthesized NLO-active arylphosphine oxides show spectroscopic properties in accordance with the proposed structures using n.m.r. spectrometry. These NLO-active arylphosphine oxides and polymer matrix exhibit Optical Transparency down to 400 nm, and excellent thermal stability (Td> 345°C). An NLO-active chromophore with short absorption wavelength is desirable for application in frequency doubling. Moreover, the excellent thermal stability of the chromophore will prevent its decomposition during the poling process at elevated temperatures. The homogeneity of these guest-host NLO polymers are confirmed using scanning electron microscopy (SEM). The second-order nonlinearity and temporal stability of these NLO polymers were also reported. The relationship between molecular motion and temporal stability are studied by dielectric analysis. © 1998 Elsevier Science Ltd. All rights reserved.

  • Second-order nonlinear Optical properties of a polymer exhibiting Optical Transparency down to 340 nm
    Journal of Macromolecular Science Part A, 1994
    Co-Authors: M. Kamath, Ru-jong Jeng, C. E. Masse, Mario J. Cazeca, X. L. Jiang, Jayant Kumar, S. K. Tripathy
    Abstract:

    Abstract The synthesis and characterization of an epoxy-based nonlinear Optical (NLO) polymer exhibiting Optical Transparency down to 340 nm is reported. The synthesized polymers show spectroscopic properties (NMR, IR, UV) in accordance with the proposed structures. A glass transition temperature (Tg) of 92°C and a thermal degradation temperature (Td) of 322°C were recorded. The poled polymer film exhibits stable second-order nonlinear Optical activity (d33 = 4.2 pm/V) over a period of 800 hours as characterized by the temporal response of the second harmonic signal at room temperature.

Cheng Ye - One of the best experts on this subject based on the ideXlab platform.

  • Introduction of an Isolation Chromophore into an “H”‐Shaped NLO Polymer: Enhanced NLO Effect, Optical Transparency, and Stability
    ChemPlusChem, 2013
    Co-Authors: Wenbo Wu, Cheng Ye, Zhen Li
    Abstract:

    In this study, a new polymer P1 embedded with “H”-type chromophore moieties was designed and synthesized through Suzuki coupling copolymerization, in which the isolation chromophore was introduced to further improve its comprehensive performance. This polymer demonstrated good solubility and film-forming ability. In comparison with normal ”H”-shaped NLO polymers only containing one type of chromophore, nearly all the performance of P1 was improved. Its NLO coefficient was as high as 134 pm V−1, and its onset temperature for decay was up to 150 °C. Coupled with its improved Optical Transparency, all these properties made it a promising candidate for practical applications in photonic fields.

  • Main-chain second-order nonlinear Optical polyaryleneethynylenes containing isolation chromophores: enhanced nonlinear Optical properties, improved Optical Transparency and stability
    Polymer Chemistry, 2013
    Co-Authors: Wenbo Wu, Zhen Xu, Cheng Ye, Zhen Li
    Abstract:

    In this paper, five nitro azo chromophore based main-chain second-order nonlinear Optical (NLO) polyaryleneethynylenes are successfully prepared, in which isolation chromophore moieties (sulfonyl ones) with different concentrations were introduced to improve the poling efficiency of the resultant polymers. Thanks to the effect of the isolation chromophore, P5 exhibited the largest d33 value of 111.1 pm V−1 as well as the best thermal stability and Optical Transparency, indicating that the isolation chromophore moieties could alleviate the “nonlinearity-stability trade off” and “nonlinearity-Transparency trade off” in the NLO area efficiently.

  • new hyperbranched polytriazoles containing isolation chromophore moieties derived from ab4 monomers through click chemistry under copper i catalysis improved Optical Transparency and enhanced nlo effects
    Chemistry: A European Journal, 2012
    Co-Authors: Wenbo Wu, Cheng Ye, Gui Yu, Zhen Li
    Abstract:

    By modifying a synthetic procedure, two new hyperbranched polytriazoles (HP1 and HP2) containing isolation chromophores were synthesized successfully through click chemistry reactions under copper(I) catalysis. For the first time, these two polymers were derived from an AB4-type monomer, although they contain different end-capping chromophores. They are soluble in normal polar organic solvents and are well characterized. Thanks to the presence of the isolation chromophore, the two polymers demonstrate good nonlinear Optical (NLO) properties and Optical Transparency, making them promising candidates for practical applications.

  • symmetric versus unsymmetric platinum ii bis aryleneethynylene s with distinct electronic structures for Optical power limiting Optical Transparency trade off optimization
    Advanced Functional Materials, 2009
    Co-Authors: Guijiang Zhou, Wai-yeung Wong, Sukyue Poon, Cheng Ye
    Abstract:

    A new series of symmetric and unsymmetric Pt(ll) bis(acetylide) complexes of the type D-C≡C-Pt(PBu 3 ) 2 -C≡C-D (D-Pt-D), A-C≡C-Pt(PBi 3 ) 2 -C≡C-A (A-Pt-A) and D-C≡C-Pt(PBu 3 ) 2 -C≡C-A (D-Pt-A) (D, donor groups; A, acceptor groups) are synthesized, and show superior Optical power limiting (OPL)/Optical Transparency trade-offs. By tailoring the electronic properties of the aryleneethynylene group, distinct electronic structures for these metalated complexes can be obtained, which significantly affect their photophysical behavior and OPL properties for a nanosecond laser pulse at 532 nm. Electronic influence of the ligand type and the molecular symmetry of metal group on the Optical Transparency/nonlinearity optimization is thoroughly elucidated. Generally, aryleneethynylene ligands with π electron-accepting nature will effectively enhance the harvesting efficiency of the triplet excited states. The ligand variation to the OPL strength of these Pt(ll) compounds follows the order: D-Pt-D > D-Pt-A > A-Pt-A. These results could be attributed to the distinctive excited state character induced by their different electronic structures, on the basis of the data from both photophysical studies and theoretical calculations. All of the complexes show very good Optical transparencies in the visible-light region and exhibit excellent OPL responses with very impressive figure of merit σ ex /σ o values (up to 17), which remarkably outweigh those of state-of-the-art reverse saturable absorption dyes such as C 60 and metallophthalocyanines with very poor transparencies. Their lower Optical-limiting thresholds (0.05 J cm -2 at 92% linear transmittance) compared with that of the best materials (ca. 0.07 j J cm -2 for InPc and PbPc dyes) currently in use will render these highly transparent materials promising candidates for practical OPL devices for the protection of human eyes and other delicate electro-optic sensors.

  • Symmetric versus unsymmetric platinum(II) bis(aryleneethynylene)s with distinct electronic structures for Optical power limiting/Optical Transparency trade-off optimization
    Advanced Functional Materials, 2009
    Co-Authors: Guijiang Zhou, Wai-yeung Wong, Sukyue Poon, Cheng Ye
    Abstract:

    A new series of symmetric and unsymmetric Pt(ll) bis(acetylide) complexes of the type D-C≡C-Pt(PBu 3 ) 2 -C≡C-D (D-Pt-D), A-C≡C-Pt(PBi 3 ) 2 -C≡C-A (A-Pt-A) and D-C≡C-Pt(PBu 3 ) 2 -C≡C-A (D-Pt-A) (D, donor groups; A, acceptor groups) are synthesized, and show superior Optical power limiting (OPL)/Optical Transparency trade-offs. By tailoring the electronic properties of the aryleneethynylene group, distinct electronic structures for these metalated complexes can be obtained, which significantly affect their photophysical behavior and OPL properties for a nanosecond laser pulse at 532 nm. Electronic influence of the ligand type and the molecular symmetry of metal group on the Optical Transparency/nonlinearity optimization is thoroughly elucidated. Generally, aryleneethynylene ligands with π electron-accepting nature will effectively enhance the harvesting efficiency of the triplet excited states. The ligand variation to the OPL strength of these Pt(ll) compounds follows the order: D-Pt-D > D-Pt-A > A-Pt-A. These results could be attributed to the distinctive excited state character induced by their different electronic structures, on the basis of the data from both photophysical studies and theoretical calculations. All of the complexes show very good Optical transparencies in the visible-light region and exhibit excellent OPL responses with very impressive figure of merit σ ex /σ o values (up to 17), which remarkably outweigh those of state-of-the-art reverse saturable absorption dyes such as C 60 and metallophthalocyanines with very poor transparencies. Their lower Optical-limiting thresholds (0.05 J cm -2 at 92% linear transmittance) compared with that of the best materials (ca. 0.07 j J cm -2 for InPc and PbPc dyes) currently in use will render these highly transparent materials promising candidates for practical OPL devices for the protection of human eyes and other delicate electro-optic sensors.

Rong Ho Lee - One of the best experts on this subject based on the ideXlab platform.

  • A novel second-order nonlinear Optical guest-host polymeric material exhibiting Optical Transparency down to 400 nm
    Polymer, 1999
    Co-Authors: Rong Ho Lee, Ging-ho Hsiue, Ru-jong Jeng
    Abstract:

    A guest-host system of a nonlinear Optical (NLO) arylphosphine oxide and polyhydroxystyrene (PSOH) has been investigated for second-order nonlinear optics. The synthesized NLO-active arylphosphine oxides show spectroscopic properties in accordance with the proposed structures using n.m.r. spectrometry. These NLO-active arylphosphine oxides and polymer matrix exhibit Optical Transparency down to 400 nm, and excellent thermal stability (Td> 345°C). An NLO-active chromophore with short absorption wavelength is desirable for application in frequency doubling. Moreover, the excellent thermal stability of the chromophore will prevent its decomposition during the poling process at elevated temperatures. The homogeneity of these guest-host NLO polymers are confirmed using scanning electron microscopy (SEM). The second-order nonlinearity and temporal stability of these NLO polymers were also reported. The relationship between molecular motion and temporal stability are studied by dielectric analysis. © 1998 Elsevier Science Ltd. All rights reserved.

Ging-ho Hsiue - One of the best experts on this subject based on the ideXlab platform.

  • A novel second-order nonlinear Optical guest-host polymeric material exhibiting Optical Transparency down to 400 nm
    Polymer, 1999
    Co-Authors: Ging-ho Hsiue, Ru-jong Jeng
    Abstract:

    A guest-host system of a nonlinear Optical (NLO) arylphosphine oxide and polyhydroxystyrene (PSOH) has been investigated for second-order nonlinear optics. The synthesized NLO-active arylphosphine oxides show spectroscopic properties in accordance with the proposed structures using n.m.r. spectrometry. These NLO-active arylphosphine oxides and polymer matrix exhibit Optical Transparency down to 400 nm, and excellent thermal stability (Td > 345°C). An NLO-active chromophore with short absorption wavelength is desirable for application in frequency doubling. Moreover, the excellent thermal stability of the chromophore will prevent its decomposition during the poling process at elevated temperatures. The homogeneity of these guest-host NLO polymers are confirmed using scanning electron microscopy (SEM). The second-order nonlinearity and temporal stability of these NLO polymers were also reported. The relationship between molecular motion and temporal stability are studied by dielectric analysis.

  • A novel second-order nonlinear Optical guest-host polymeric material exhibiting Optical Transparency down to 400 nm
    Polymer, 1999
    Co-Authors: Rong Ho Lee, Ging-ho Hsiue, Ru-jong Jeng
    Abstract:

    A guest-host system of a nonlinear Optical (NLO) arylphosphine oxide and polyhydroxystyrene (PSOH) has been investigated for second-order nonlinear optics. The synthesized NLO-active arylphosphine oxides show spectroscopic properties in accordance with the proposed structures using n.m.r. spectrometry. These NLO-active arylphosphine oxides and polymer matrix exhibit Optical Transparency down to 400 nm, and excellent thermal stability (Td> 345°C). An NLO-active chromophore with short absorption wavelength is desirable for application in frequency doubling. Moreover, the excellent thermal stability of the chromophore will prevent its decomposition during the poling process at elevated temperatures. The homogeneity of these guest-host NLO polymers are confirmed using scanning electron microscopy (SEM). The second-order nonlinearity and temporal stability of these NLO polymers were also reported. The relationship between molecular motion and temporal stability are studied by dielectric analysis. © 1998 Elsevier Science Ltd. All rights reserved.

Zhen Li - One of the best experts on this subject based on the ideXlab platform.