Three-dimensional optical holography using a plasmonic metasurface
Three-dimensional optical holography using a plasmonic metasurface
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使用等离子体超表面的三维光学全息术
DOI：
10.1038/ncomms3808
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发表时间：
2013-11-01
影响因子：
16.6
通讯作者：
Zhang, Shuang
中科院分区：
文献类型：
--
作者：
Huang, Lingling;Chen, Xianzhong;Zhang, Shuang
受益于光响应工程的灵活性，超材料已被用于实现对光传播的控制，达到前所未有的水平，与天然材料相比，具有高度非常规和多用途的光学功能。最近，新兴的超表面领域，由单层光子人造原子组成，通过引入突然的界面相位不连续，为塑造光的波前提供了有吸引力的功能。本文利用空间取向变化的亚波长金属纳米棒构成的超表面实现三维全息。当入射圆偏振光的螺旋度反转时，就会发生相位不连续。由于可以通过杆的方向连续控制每个亚波长单位细胞中的相位，因此超表面代表了实现具有宽视场的高分辨率轴上三维全息图的新途径。此外，消除了通常伴随全息术的多个衍射级的不良影响。
Benefitting from the flexibility in engineering their optical response, metamaterials have been used to achieve control over the propagation of light to an unprecedented level, leading to highly unconventional and versatile optical functionalities compared with their natural counterparts. Recently, the emerging field of metasurfaces, which consist of a monolayer of photonic artificial atoms, has offered attractive functionalities for shaping wave fronts of light by introducing an abrupt interfacial phase discontinuity. Here we realize three-dimensional holography by using metasurfaces made of subwavelength metallic nanorods with spatially varying orientations. The phase discontinuity takes place when the helicity of incident circularly polarized light is reversed. As the phase can be continuously controlled in each subwavelength unit cell by the rod orientation, metasurfaces represent a new route towards high-resolution on-axis three-dimensional holograms with a wide field of view. In addition, the undesired effect of multiple diffraction orders usually accompanying holography is eliminated.