Polarization multiplexing and bifocal optical vortex metalens

Wang, Wei; Guo, Chong; Zhao, Zehan; Li, Jing; Shi, Yan

doi:10.1016/j.rinp.2020.103033

Cited by 25 publications

(11 citation statements)

References 33 publications

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“…Benefitting from the high design freedom, metalens is also popular to focus the customized beams such as vortex beams [14][15][16][17][18][19] . The desired phase profile, especially those that are too complicated to be presented by an analytical equation, can be extracted from the simulations, or obtained by numerical strategies such as computergenerated holography methods 20,21 .…”

Section: Phase Profile Designmentioning

confidence: 99%

Dielectric metalens for miniaturized imaging systems: progress and challenges

et al. 2022

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Lightweight, miniaturized optical imaging systems are vastly anticipated in these fields of aerospace exploration, industrial vision, consumer electronics, and medical imaging. However, conventional optical techniques are intricate to downscale as refractive lenses mostly rely on phase accumulation. Metalens, composed of subwavelength nanostructures that locally control light waves, offers a disruptive path for small-scale imaging systems. Recent advances in the design and nanofabrication of dielectric metalenses have led to some high-performance practical optical systems. This review outlines the exciting developments in the aforementioned area whilst highlighting the challenges of using dielectric metalenses to replace conventional optics in miniature optical systems. After a brief introduction to the fundamental physics of dielectric metalenses, the progress and challenges in terms of the typical performances are introduced. The supplementary discussion on the common challenges hindering further development is also presented, including the limitations of the conventional design methods, difficulties in scaling up, and device integration. Furthermore, the potential approaches to address the existing challenges are also deliberated.

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Section: Phase Profile Designmentioning

confidence: 99%

Dielectric metalens for miniaturized imaging systems: progress and challenges

et al. 2022

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“…The relative local phase and phase gradient can be calculated using the measured positions of focuses in a sub-pixel. The polarization multifunctionality of the metalens can also provide various opportunities for multiplexing deflection and focusing (Gao et al, 2019a) and for multi-generation of an optical vortex (Wang et al, 2020b). In addition to multifunctionality of polarization and frequency, angle multifunctional metalens gives miniaturized and powerful tools to quantitative phase imaging.…”

Section: Ll Open Accessmentioning

confidence: 99%

Recent Progress on Ultrathin Metalenses for Flat Optics

et al. 2020

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As technology advances, electrical devices such as smartphones have become more and more compact, leading to a demand for the continuous miniaturization of optical components. Metalenses, ultrathin flat optical elements composed of metasurfaces consisting of arrays of subwavelength optical antennas, provide a method of meeting those requirements. Moreover, metalenses have many other distinctive advantages including aberration correction, active tunability, and semi-transparency, compared to their conventional refractive and diffractive counterparts. Therefore, over the last decade, great effort has been focused on developing metalenses to investigate and broaden the capabilities of metalenses for integration into future applications. Here, we discuss recent progress on metalenses including their basic design principles and notable characteristics such as aberration correction, tunability, and multifunctionality.

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“…The vortex metalens can produce the converged vortex beam with a focal plane, which can be designed by integrating the functions of vortex generators and lenses into a single metasurface. Generally speaking, vortex metalens based on the Pancharatnam−Berry (PB) phase is a bipolar metalens, which only achieve one kind of spin light [44][45][46][47]. Through multiplexing two opposite polarity vortex metalenses based on the PB phase, the focusing vortex beam with arbitrary topological charge can be produced for two opposite spin lights [44,48].…”

Section: Introductionmentioning

confidence: 99%

“…Generally speaking, vortex metalens based on the Pancharatnam−Berry (PB) phase is a bipolar metalens, which only achieve one kind of spin light [44][45][46][47]. Through multiplexing two opposite polarity vortex metalenses based on the PB phase, the focusing vortex beam with arbitrary topological charge can be produced for two opposite spin lights [44,48]. However, under left circularly polarized (LCP) or right circularly polarized (RCP) light incidence, one part of the metasurface units work and produce the convergent vortex beam; other metasurface units do not work or play the opposite role.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Spin-Related Vortex Metalenses

et al. 2021

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In this paper, one spin-selected vortex metalens composed of silicon nanobricks is designed and numerically investigated at the mid-infrared band, which can produce vortex beams with different topological charges and achieve different spin lights simultaneously. Another type of spin-independent vortex metalens is also designed, which can focus the vortex beams with the same topological charge at the same position for different spin lights, respectively. Both of the two vortex metalenses can achieve high-efficiency focusing for different spin lights. In addition, the spin-to-orbital angular momentum conversion through the vortex metalens is also discussed in detail. Our work facilitates the establishment of high-efficiency spin-related integrated devices, which is significant for the development of vortex optics and spin optics.

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Polarization multiplexing and bifocal optical vortex metalens

Cited by 25 publications

References 33 publications

Dielectric metalens for miniaturized imaging systems: progress and challenges

Dielectric metalens for miniaturized imaging systems: progress and challenges

Recent Progress on Ultrathin Metalenses for Flat Optics

High-Efficiency Spin-Related Vortex Metalenses

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