期刊
ADVANCED OPTICAL MATERIALS
卷 9, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202001284
关键词
Airy optical beams; broadband; high efficiency; metasurfaces
资金
- National Key R&D Program of China [2018YFB2200200, 2018YFA0701800]
- National Natural Science Foundation of China [11674118, 12074137, 81701745, 61775140, 61875225]
- Shanghai Municipal Science and Technology Commission Innovation Action Plan [18DZ1100400]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
Conventional methods for generating Airy beams are limited by bulky and costly systems, but a new design strategy utilizing the high birefringence and transmission efficiency of dielectric metasurfaces allows for the construction of a broadband and high-efficiency transmissive Airy optical beam generator. Experimental verification of this method demonstrates its effectiveness and showcases the unique characteristics of Airy beams.
Conventional approaches for generating Airy beams rely upon bulky and costly systems, which impede the miniaturization of optical systems. Metasurfaces have provided a compact method to generate Airy optical beams, but the current schemes suffer from the issues of narrow bandwidths and/or low transmission efficiencies. Here, a design strategy of constructing broadband and high-efficiency transmissive Airy optical beam generator by taking advantages of the high birefringence and transmission efficiency of dielectric metasurfaces is proposed. The local amplitude and phase of transmitted light can be simultaneously modulated to satisfy the Airy function by controlling the orientation angles of silicon nano-pillars, regardless of the incidence wavelength. The resultant Airy beam generator is experimentally verified within an ultra-wide operation bandwidth from 1.1 to 1.7 mu m. The remarkable diffraction-free, self-accelerating, and self-healing properties of Airy beams are also demonstrated. The results may power up viable opportunities for practical devices and applications of metasurface-based Airy beams.
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