Multifocal Plane Display Based on Dual Polarity Stereoscopic Metasurface

Zhang, Xue; Li, Xin; Zhou, Hongqiang; Wei, Qunshuo; Geng, Guangzhou; Li, Junjie; Li, Xiaowei; Wang, Yongtian; Huang, Lingling

doi:10.1002/adfm.202209460

Cited by 20 publications

(7 citation statements)

References 40 publications

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“…They clarified that transmitted light and reflected light can propagate in any direction in their respective half space, and the propagation direction depends on the direction of the metasurface phase gradient, the numerical magnitude and the refractive index of the surrounding medium. Metasurfaces have been widely used in wavefront engineering [3][4][5][6], focusing or imaging elements [7][8][9][10][11], beam shaping [12], vortex beam generation [13][14][15][16], holographic technology [17][18][19], biosensing [20], electromagnetic concealment [21], achromatic focusing [22], electromagnetic wave modulation [23] and nonlinear interactions [24,25] have been applied in 3D imaging [26], Cellular-resolution optical coherence tomography [27], holographic imaging [28][29][30][31], optical cryptography [32,33] and wireless power transfer (WPT) system [34][35][36]. For example, researchers achieved optical information multiplexing by a designed multifocal metalens using of nonlinear coding Pancharatnam-Berry phase metasurface [37].…”

Section: Introductionmentioning

confidence: 99%

Off-axis bifocal metalens for displacement measurement

Cao,

Li,

et al. 2024

Nanotechnology

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Metasurface is a new type of micro-optical element developed in recent years. It can intelligently modulate electromagnetic waves by adjusting the geometrical parameters and arrangement of dielectric structures. In this paper, a bifocal metalens based on modulation of propagation phase was designed for the potential application in displacement measurement. The phase of the bifocal lens is designed by the optical holography-like method., which is verified by the scalar diffraction theory. We designed a square aperture lens with a side length of 200μm to realize two focal spots with focal lengths of 900μm and 1100μm. The two focal spots aren’t on one optical axis. The polarization insensitive TiO2 cylinders are chosen as structure units. Four structures with different radius are selected to achieve the four phase steps. We fabricated the designed bifocal metalens using electron beam lithography and atomic layer deposition (ALD) techniques, and measured the light intensity in the areas near the two foci in the direction of the longitudinal axis. The differential signal was calculated, from which we obtained a linear interval. It demonstrates the ability of bifocal differential measurement to be applied to displacement measurement. Because the metasurfaces production process is semiconductor compatible, the bifocal lens is easy to integrate and can be used for miniaturized displacement measurements, micro-resonators, acceleration measurements, and so on.

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Section: Introductionmentioning

confidence: 99%

Off-axis bifocal metalens for displacement measurement

Cao,

Li,

et al. 2024

Nanotechnology

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“…Metasurface, composed of arrays of subwavelength structures, has been widely applied in areas such as vector light generation 1, 2 , holographic [3][4][5] , imaging [6][7][8][9] , and information encryption [10][11][12] due to its compact nature and great ability. By adjusting the arrangement, size, and orientation angle of the structures on the metasurface, flexible wavefront modulation can be realized in the plane.…”

Section: Introductionmentioning

confidence: 99%

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Chen,

Zhang,

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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Catenary metasurface has been widely used in fields such as wild-angle imaging, spectral detection, and broadband absorbers, due to its advantages of high efficiency and broadband. In our previous studies, perfect wavefront control of catenary metasurface is achieved via field-driven optimization (FDO). However, the proposed method focuses solely on the performance of catenary metasurfaces at a specific wavelength. Here, considering the broadband and multifunctional of the catenary and catenary-like metasurfaces, multi-objectives FDO is proposed. With 30 iterations, the average diffraction efficiency of the catenary metasurface increases to ~96% at the wavelength of 9-13 μm. In addition, considering the functionality, the catenary and catenary-like metasurfaces are optimized with a pair of orthogonal polarized light incidences. The optimization process preserves the chiral nature of the catenary metasurface. After 30 iterations, the diffraction efficiency of the catenary metasurface is improved from 96.4% to 99.2%. For catenary-like metasurfaces, the diffraction efficiencies exceed 90% for both left-handed and right-handed elliptically polarized light incidences. Our work provides a methodology for designing multifunctional complex continuous metasurfaces, which may further promote catenary optics.

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“…The study of structured light [31][32][33], beam shaping techniques [34][35][36][37] and metalenses [38,39] to conquer the limits of optical systems are enthusiastic research regimes. However, conventional lenses with a specially designed structure have high manufacturing costs and are limited by a lack of dynamic modulation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Robust propagation of a steady optical beam through turbulence with extended depth of focus based on spatial light modulator

2023

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Finding appropriate strategies to increase the robustness to turbulence with extended depth of focus (DOF) is the common requirement in developing high-resolution imaging through air or water medium. However, the conventional lens with a specially designed structure requires high manufacturing costs and is limited by the lack of dynamic modulation characteristics. Spatial light modulator (SLM), the unique flat-panel optical device, can break through the distance limitation of beam propagation for the dynamic modulation property. In this work, we address the dynamic generation of the steady optical beam (STOB) based on the mechanism of transverse wave vector elimination. STOB generated by the SLM has significant advantages over Gaussian beams for the characteristics of peak intensity, robust propagation, extended-DOF beam profile, and dynamic wavefront modulation over a long distance under strong turbulent media. Our versatile, extensible, and flexible method has promising application scenarios for the realization of turbulence-resistant circumstances.

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Multifocal Plane Display Based on Dual Polarity Stereoscopic Metasurface

Cited by 20 publications

References 40 publications

Off-axis bifocal metalens for displacement measurement

Off-axis bifocal metalens for displacement measurement

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Robust propagation of a steady optical beam through turbulence with extended depth of focus based on spatial light modulator

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