Compound Vector Light Generator Based on a Metasurface

Zhou, Changda; Mou, Zhen; Lu, Peiyao; Teng, Shuyun

doi:10.3390/photonics8070243

Cited by 8 publications

(5 citation statements)

References 34 publications

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“…Thus, metasurfaces have been proposed to control the phase and wavefront of light field, and various kinds of the metasurface elements including metalens [11][12][13], metasurface hologram [14,15], beam deflector [16,17], vortex generator [18][19][20] and vector light generator [21][22][23] have been advanced. The designed metasurface elements based on different working modes have different optical performance.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Metalenses Based on Three Kinds of Phase Compensation Techniques

Zhou

Mou

et al. 2021

Nanomaterials

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The phase delays introduced by anisotropic nanounits include propagation phase delay, resonant phase delay and geometric phase delay. Various phase devices can be formed based on the metasurfaces consisting of anisotropic nanounits and the phase devices of the same kind function have different performances because of different working modes. In this paper, metalenses and vortex metalenses are chosen as examples to compare the optical performance of metasurface phase devices based on three kinds of phase compensation techniques. We design separately three kinds of metalenses and vortex metalenses using the cross nanoholes, L-shaped nanohole and V-shaped nanoholes and simulate numerically their intensity and phase distributions. Additionally, the results show the differences among these elements in structure complexity, polarization dependence, working efficiency and phase uniformity. The comparison for three kinds of metalenses clearly shows the merits of different phase compensation techniques and this work must be helpful for expanding the practical applications of metasurfaces.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Metalenses Based on Three Kinds of Phase Compensation Techniques

Zhou

Mou

et al. 2021

Nanomaterials

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“…Otherwise, as the orders of inner and outer vector beams are close, their interference makes the compound vortex beam damaged or even invisible. [ 35 ] Just because of the slight interference, the continuity of the intensity rings shown in Figures 3 and 4 are influenced. Furthermore, the structure optimization of compound vortex metalens and the numerical simulations are finished with the help of the finite difference time domain technique.…”

Section: Results Of Numerical Simulationmentioning

confidence: 99%

Compound Vortex Metalens with Linearly Polarized Encryption

Zhou

Yue

et al. 2023

Annalen der Physik

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In view of the rapid development of nano‐fabrication technology and the wide application of composite vortex fields, a kind of compound vortex metalens with polarization encryption is proposed. The proposed compound vortex metalens can simultaneously generate compound vortex beams with double annular strengths, unequal topological charges, and specific polarization states in different radial regions, which have the characteristic of higher dimensional singularity. The compound vortex metalens consisting of rectangular nanoholes works under linearly polarized light illumination, and the topological charges of the generated compound vortex beam can be modulated through rotating nanoholes. Simulation results and theoretical analysis verify the reliability of polarization‐coded compound vortex beam metalens. The variation of polarized encrypted transmission field with the incident polarized angle shows the broader performance of polarization encryption compound vortex metalens. The multiple singularities and polarization encryption properties of the generated compound vortex beams combining with the integrated metasurface will be helpful for broadening the applications of singular beams.

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“…The amplitudes of two parts are different, and when the nanohole can be equivalent to a half wave plate, namely, t o = t e and δ = π, the first term disappears and the cross polarization conversion efficiency reaches the maximum. In practice, the equivalent half wave plate can be obtained through optimizing the parameters of nanohole, like the cross nanoholes proposed by our group [33,34]. Moreover, we notice that an additional phase term of e ±j2α is carried by the cross circular polarization.…”

Section: Metasurface Designmentioning

confidence: 95%

Vector beams encoded by diverse orthogonal polarization states and their generation based on metasurfaces

Yue

et al. 2023

New J. Phys.

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Vector beams with spatially varying polarization states have wide application prospects. Convenient and feasible generation of compact vector beams become important for the applications in integrated optics and optical communication. Based on the superposition of orthogonal polarization vortex beams and the metasurface design, this paper studies systematically vector beams with hybrid states of polarization in diverse orthogonal polarization encoding. The spatial polarization of vector beam can be controlled through choosing the polarization types and adjusting the contributions of two orthogonal polarized beams. The generated vector beams based on metasurfaces verify the output of diversity polarization states in the transverse plane. The high polarization sensitivity of vector beam is beneficial to the polarization multiplexing and the utilization of optical metasurface realizes the polarization manipulation in nanometer scale. This work lays the foundation for the construction of complex vector beams and it is helpful for expanding the applications of vector beams.

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Compound Vector Light Generator Based on a Metasurface

Cited by 8 publications

References 34 publications

Performance Analysis of Metalenses Based on Three Kinds of Phase Compensation Techniques

Performance Analysis of Metalenses Based on Three Kinds of Phase Compensation Techniques

Compound Vortex Metalens with Linearly Polarized Encryption

Vector beams encoded by diverse orthogonal polarization states and their generation based on metasurfaces

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