Generation of diffraction-free beams using resonant metasurfaces

Several metasurface diffraction-free beam generators are designed by using a set of resonant V-shaped nanoholes. Cosine beams, Bessel beams and cosine Bessel beams are generated through the corresponding metasurface structures with V-shaped nanoholes arranged in different ways. Theoretical analysis...

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Bibliographic Details
Published inNew journal of physics Vol. 22; no. 10; pp. 103064 - 103070
Main Authors Bao, Rui, Mou, Zhen, Zhou, Changda, Bai, Qingwang, He, Xiaobo, Han, Zhanghua, Wang, Shuyun, Teng, Shuyun
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2020
Subjects
Beams (radiation)
Bessel beam
cosine Bessel beam
Diffraction
Generators
metasurface
Metasurfaces
Micromanipulation
Physics
Thickness
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Summary:Several metasurface diffraction-free beam generators are designed by using a set of resonant V-shaped nanoholes. Cosine beams, Bessel beams and cosine Bessel beams are generated through the corresponding metasurface structures with V-shaped nanoholes arranged in different ways. Theoretical analysis provides the design mechanism for these diffraction-free beam generators, numerical simulations and experiment measurement give the powerful verification for the generation of diffraction-free beams. The proposed diffraction-free beam generators have advantages of ultra-thin thickness, compact structure, ease to manufacture and flexibility to operate. The generated diffraction-free beams show high efficiency, polarization independence and validity for any visible wavelength. The compact design is benefit to the applications of diffraction-free beams in nanometer fabrication, optical integrated imaging and optical micromanipulation.
Bibliography:NJP-112503.R1
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/abc084