All-Dielectric Meta-Surface for Multispectral Photography by Theta Modulation

The traditional theta modulator encodes input information by superimposing Ronchi sub-gratings, which is extremely easy to cause spatial channel overlap that results in bands mixing. In this case, we present an all-dielectric theta modulation meta-surface with a new encoding method, which separates...

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Veröffentlicht in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-02, Vol.10 (2), p.369
Hauptverfasser: Xiang, Meng, Kuang, Dengfeng, Kong, Weichao, Huang, Zengxin, Gu, Panchun, Li, Wenshuang
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Sprache:eng
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Zusammenfassung:The traditional theta modulator encodes input information by superimposing Ronchi sub-gratings, which is extremely easy to cause spatial channel overlap that results in bands mixing. In this case, we present an all-dielectric theta modulation meta-surface with a new encoding method, which separates red, green, blue, and achromatic spatial channels on the focal plane. The meta-surface ensures that the positions of focal points are relatively consistent while focusing energy into the sub-wavelength regions. Our study offers a way to facilitate device miniaturization and system integration, which may have an important application in compact multispectral photography only with one detector.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10020369