期刊
NANO LETTERS
卷 22, 期 15, 页码 6342-6349出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c02115
关键词
Coherence; light manipulation; statistical metasurface
类别
资金
- National Key Research and Development Program of China [2021YFA1400601, 2019YFA0705000]
- National Natural Science Fund for Distinguished Young Scholar [11925403]
- National Natural Science Foundation of China [12122406, 12192253, 12192254, 11974193, 11974218, 11904183, 11904181]
- Natural Science Foundation of Tianjin for Distinguished Young Scientists [18JCJQJC45700]
- China Postdoctoral Science Foundation [2021M690084]
- Innovation Group of Jinan [2018GXRC010]
- Local Science and Technology Development Project of the Central Government [YDZX20203700001766]
This study successfully manipulates the spatial coherence of light fields by loading different random phase distributions onto the wavefront, thereby generating partially coherent light with a predefined degree of coherence. This design strategy can easily be applied to manipulate arbitrary phase-only special beams with the same degree of coherence.
Coherence, similar to amplitude, polarization, and phase, is a fundamental characteristic of the light fields and is dominated by the statistical optical property. Although spatial coherence is one of the pivotal optical dimensions, it has not been significantly manipulated on the photonic platform. Here, we theoretically and experimentally manipulate the spatial coherence of light fields by loading different random phase distributions onto the wavefront with a metasurface. We achieve the generation of partially coherent light with a predefined degree of coherence and continuously modulate it from coherent to incoherent by controlling the phase fluctuation ranges or the beam sizes. This design strategy can be easily extended to manipulate arbitrary phase-only special beams with the same degree of coherence. Our approach provides straightforward rules to manipulate the coherence of light fields in an extra-cavity-based manner and paves the way for further applications in ghost imaging and information transmission in turbulent media.
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