1. Generation of Polarization-Sensitive Modulated Optical Vortices with All-Dielectric Metasurfaces
- Author
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Xiong Li, Chao Yan, Fei Zhang, Zuojun Zhang, Yinghui Guo, Xiangang Luo, Kaipeng Liu, Xiaoliang Ma, Ping Gao, and Mingbo Pu
- Subjects
Microelectromechanical systems ,Wavefront ,Materials science ,Silicon ,business.industry ,Optical communication ,Phase (waves) ,Physics::Optics ,chemistry.chemical_element ,02 engineering and technology ,Dielectric ,021001 nanoscience & nanotechnology ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,010309 optics ,chemistry ,0103 physical sciences ,Optoelectronics ,Electrical and Electronic Engineering ,Spiral (railway) ,0210 nano-technology ,business ,Optical vortex ,Biotechnology - Abstract
Optical vortices (OVs) created from helical modes of light have extensive applications in optical manipulation, imaging, and optical communications. Moreover, modulated optical vortices (MOVs) with modified wavefronts could provide new opportunities for fractionating particles and actuating microelectromechanical systems. Traditional devices for generating MOVs include spatial light modulators, spiral phase plates, and so on. However, such bulky devices are difficult to be applied to high-level integrated optical systems. Besides, other MOV generators are typically static and polarization-insensitive. Here, we proposed an all-dielectric metasurface to generate polarization-sensitive MOVs. The intensity patterns of the OVs can be modulated by adding a tangential modulation factor in the phase profile. Independent manipulation of two orthogonal polarizations was adopted via tailoring the geometric parameters of silicon (Si) pillars. We experimentally demonstrated that the metasurface could generate a doughn...
- Published
- 2019
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