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Enhanced photorefractivity in a polymeranocrystal composite photorefractive device at telecommunication wavelength

机译:聚合物/纳米晶体复合光折变器件在电信波长下的增强的光折射率

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摘要

Enhanced photorefractive (PR) response in nanocrystal-polymer nanocomposite PR devices at the telecommunication wavelength of 1.3 μm is achieved using facile surface treatment of PbS nanocrystals functionalized with thermally cleavable ligands. The cleavage of the ligands, by heat treatment, results in significant improvement in both photocharge generation and PR response, as demonstrated by photoconductivity and two-beam coupling (TBC) experiments, respectively. The TBC experiment shows that the optical gain coefficient is improved drastically (about 63%) at an applied electric field of 84 V/μm.
机译:纳米晶体-聚合物纳米复合材料PR器件在1.3μm的电信波长下具有增强的光折变(PR)响应,这是通过对可热裂解的配体功能化的PbS纳米晶体进行简便的表面处理而实现的。分别通过光电导和两束耦合(TBC)实验证明,通过热处理裂解配体可显着改善光电荷产生和PR反应。 TBC实验表明,在84 V /μm的施加电场下,光学增益系数大大提高(约63%)。

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  • 来源
    《Applied Physics Letters》 |2010年第26期|p.263108.1-263108.3|共3页
  • 作者单位

    Institute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA,Advanced Photonics Center, School of Electronics Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

    rnAdvanced Photonics Center, School of Electronics Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China;

    rnInstitute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA;

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