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首页> 外文期刊>Optical Materials >Surface metallization in bulk and uncoated highly polar Fe doped LiNbO_3 crystals and plasmonic application potentials
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Surface metallization in bulk and uncoated highly polar Fe doped LiNbO_3 crystals and plasmonic application potentials

机译：散装表面金属化和未涂层高极Fe掺杂Linbo_3晶体和等离子体应用势

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摘要

The identification of the surface dominant effect based on visible surface plasmons (SPs) shed new light on the strong energy coupling reported in conventional photorefractive works which mistakenly attribute the strong scattering (fanning) effect solely to the surface unevenness in the past. The root cause for visible SPs involvement, surface metallization, was dealt with in Fe doped LiNbO3 crystals with density functional theory, which can be readily generalized into more general picture regarding ferroelectric oxides. To prove that these material systems are promising for chemical and biological applications, salt water was used as the surrounding medium for bare LN slabs, finding ease in the formation of the 2D patterns, unveiling that the doping dipole states are increased remarkably. To confirm convincingly the surface dominant effect is indeed responsible for strong effect in ferroelectric oxide, truly bulk (2.0 and 11.5 mm thick) Fe doped LN samples were prepared and the key feature, 2D diffraction patterns, was observed. The reason behind the ITO coating in strengthening 2D diffraction and scattering was clearly attributed to mitigation (if not complete elimination) of doping dipole state originally formed on the surfaces with adsorbed ions. The border enhancement of the diffraction spots observed was also explained with the physical picture of grating mediated SPs' energy coupling. This work leads a way towards making visible plasmonic material with totally non conducting ferroelectric and other highly polar materials.
机译：基于可见表面等离子体（SPS）的表面显性效果的识别在传统的光折叠作品中报告的强能耦合上的新光，其误认为是过去对表面不均匀的强烈散射（扇动）效应。可见光SPS参与的根本原因，表面金属化在具有密度泛函理论的Fe掺杂的Linbo3晶体中，可以容易地广泛地推广到铁电氧化物的更普通图。为了证明这些材料系统对化学和生物学应用有前途，使用盐水作为裸LN板的周围介质，在形成2D图案的形成中，揭示掺杂偶极子状态显着增加。为了确认表面显性效果确实负责铁电氧化物中的强效应，制备真正的体积（2.0和11.5mm厚）Fe掺杂的LN样品，并且观察到关键特征，2D衍射图案。在强化2D衍射和散射的ITO涂层后面的原因明显归因于最初形成在具有吸附离子的表面上的掺杂偶极状态的缓解（如果不完全消除）。观察到的衍射斑点的边界增强也用光栅介导的SPS能量耦合的物理图像解释。这项工作引导了一种朝向完全非导电的铁电和其他高极性材料制造可见等离子体材料的方法。

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  • 来源
    《Optical Materials》 |2021年第7期|111122.1-111122.7|共7页
  • 作者

    Xiong Zuoren; Ma Xinyan; Zhang Yingbin; Zhao Hua;

  • 作者单位

    Harbin Inst Technol Sch Phys Harbin 150001 Peoples R China|Minist Ind & Informat Technol Key Lab Micronano Optoelect Informat Syst Harbin 150001 Peoples R China;

    Harbin Inst Technol Sch Phys Harbin 150001 Peoples R China|Minist Ind & Informat Technol Key Lab Micronano Optoelect Informat Syst Harbin 150001 Peoples R China;

    Harbin Inst Technol Sch Phys Harbin 150001 Peoples R China|Key Lab Microopt & Photon Technol Heilongjiang Pr Harbin 150001 Peoples R China;

    Harbin Inst Technol Sch Phys Harbin 150001 Peoples R China|Key Lab Microopt & Photon Technol Heilongjiang Pr Harbin 150001 Peoples R China|Minist Ind & Informat Technol Key Lab Micronano Optoelect Informat Syst Harbin 150001 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Surface metallization; Polarity catastrophe; 2D electron gas; Surface plasmon polariton;

    机译：表面金属化;极性灾难;2D电子气体;表面等离子体POLATITON;

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