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Surface relief and refractive index gratings patterned in chalcogenide glasses and studied by off-axis digital holography

机译:硫属化物玻璃中图案化的表面浮雕和折射率光栅,并通过轴外物数字全息进行研究

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摘要

Surface relief gratings and refractive index gratings are formed by direct holographic recording in amorphous chalcogenide nanomultilayer structures As2S3-Se and thin films As2S3. The evolution of the grating parameters, such as the modulation of refractive index and relief depth in dependence of the holographic exposure, is investigated. Off-axis digital holographic microscopy is applied for the measurement of the photoinduced phase gratings. For the high-accuracy reconstruction of the wavefront (amplitude and phase) transmitted by the fabricated gratings, we used a computational technique based on the sparse modeling of phase and amplitude. Both topography and refractive index maps of recorded gratings are revealed. Their separated contribution in diffraction efficiency is estimated. (C) 2018 Optical Society of America
机译:表面浮雕光栅和折射率光栅通过直接全息记录在无定形硫属化物纳米Multilayer结构AS2S3-SE和薄膜AS2S3中形成。 研究了光栅参数的演变,例如在全息曝光的依赖性的折射率和浮雕深度的调节。 轴轴数字全息显微镜用于测量光诱导的相位光栅。 对于由制造的光栅传输的波前(幅度和阶段)的高精度重建,我们使用了基于相位和幅度的稀疏建模的计算技术。 揭示了记录光栅的地形和折射率图。 它们估计了它们分离的衍射效率的贡献。 (c)2018年光学学会

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  • 来源
    《Applied optics》 |2018年第3期|共7页
  • 作者单位

    Moldavian Acad Sci Inst Appl Phys Kishinev Moldova;

    Moldavian Acad Sci Inst Appl Phys Kishinev Moldova;

    Moldavian Acad Sci Inst Appl Phys Kishinev Moldova;

    Moldavian Acad Sci Inst Appl Phys Kishinev Moldova;

    Tampere Univ Technol Dept Signal Proc Tampere Finland;

    Tampere Univ Technol Dept Signal Proc Tampere Finland;

    Univ Stuttgart Inst Tech Opt Stuttgart Germany;

    Univ Stuttgart Inst Tech Opt Stuttgart Germany;

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  • 正文语种 eng
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