Suppressing meta-holographic artifacts by laser coherence tuning.

Suppressing meta-holographic artifacts by laser coherence tuning.
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通过激光相干调谐抑制元全息伪影

DOI:
10.1038/s41377-021-00547-0
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发表时间:
2021-05-19
期刊:
Light, science & applications
影响因子:
--
通讯作者:
Cao H
Cao H
中科院分区:
其他
文献类型:
--
作者:
Eliezer Y;Qu G;Yang W;Wang Y;Yılmaz H;Xiao S;Song Q;Cao H

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超表面全息图将精细空间分辨率和大视角与平面形状因子和紧凑尺寸相结合。然而,它遭受的相干工件源自紧密堆积的元原子和纳米级功能的制造缺陷之间的电磁串扰。在这里,我们介绍了一种有效的方法来抑制所有文物微调照明的空间相干性。我们的方法是实施与简并腔激光器,它允许在很宽的范围内的空间相干性的精确和连续的调谐,在发射光谱和总功率的变化很小。我们找到了最佳的空间相干度,以抑制相干伪影的元全息图,同时保持图像的清晰度。这项工作铺平了道路,紧凑和动态全息显示无相干缺陷。一种特殊类型的激光器能够精确和连续地调谐空间相干性,抑制元全息图的相干伪影(i),同时保持图像清晰度、发射光谱和功率(ii)。
A metasurface hologram combines fine spatial resolution and large viewing angles with a planar form factor and compact size. However, it suffers coherent artifacts originating from electromagnetic cross-talk between closely packed meta-atoms and fabrication defects of nanoscale features. Here, we introduce an efficient method to suppress all artifacts by fine-tuning the spatial coherence of illumination. Our method is implemented with a degenerate cavity laser, which allows a precise and continuous tuning of the spatial coherence over a wide range, with little variation in the emission spectrum and total power. We find the optimal degree of spatial coherence to suppress the coherent artifacts of a meta-hologram while maintaining the image sharpness. This work paves the way to compact and dynamical holographic displays free of coherent defects. A special type of laser enables precise and continuous tuning of spatial coherence, suppressing the coherent artifacts (i) of a meta-hologram while maintaining image sharpness, emission spectrum and power (ii).
DOI: 10.1364/oe.17.001330
发表时间: 2009-02-02
期刊: OPTICS EXPRESS
影响因子: 3.8
作者:
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通讯作者: Shoham, Shy
DOI: 10.1364/ol.14.000479
发表时间: 1989-05-15
期刊: OPTICS LETTERS
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期刊: NANO LETTERS
影响因子: 10.8
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通讯作者: Fan, Jonathan A.
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发表时间: 2018-08-07
期刊: PHYSICAL REVIEW A
影响因子: 2.9
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