Spin-decoupled metalens with intensity-tunable multiple focal points

Yao, Bingshuang; Zang, Xiaofei; Zhu, Yang; Yu, Dahai; Xie, Jingya; Chen, Lin; Han, Shuai; Zhu, Yiming; Zhuang, Songlin

doi:10.1364/prj.420665

Cited by 38 publications

(19 citation statements)

References 64 publications

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“…Tunable metalenses can be realized to control properties of light sources such as the polarization state. Spin-decoupled metalenses have been achieved using PB phase to integrate the properties of multiple convex and concave lenses into one metasurface: 69 one phase profile focuses left-circularly polarized (LCP) incident light, while the other profile focuses right-circularly polarized (RCP) light. Therefore, the focal point changes when the polarization of incident light changes [Fig.…”

Section: Tunable Metalenses By Light Sourcementioning

confidence: 99%

“…2(b)]. Using the combination of a metalens and TN LCs, it has advantages of high image quality and fast response time 69 (c) Schematic of spin selective metalenses that can focus RCP and LCP incident beams to different focal points. 70 (d) Schematic view of metalenses using the combination of the PB phase and propagation phase.…”

Section: Tunable Metalenses By Electrical Biasmentioning

confidence: 99%

“…Research goals Multi-, varifocal length Storing multiple images 54,[129][130][131][132][133][134][135][136][137][138][139][140][141][142] Visualized sensing (thermal, chemical, etc.) [155][156][157][158][159][160][161][162] Optical encryption [140][141][142] Common stimuli Electrically tunable LC [76][77][78][79][80][81][82][149][150][151][152][153][154][155] Polarization (circular and linear polarization) [69][70][71][72][73][74][75][129][130]…”

Section: Types Metalenses Metahologramsmentioning

confidence: 99%

“…(a) Schematic illustration of spin-decoupled metalenses. 69 (b) Simulated and experimental electric field intensity distributions at line y ¼ −1.5 mm for multiple polarization states of incident light (LCP, LECP, LP, RECP, RCP from left to right) 69. (c) Schematic of spin selective metalenses that can focus RCP and LCP incident beams to different focal points 70.…”

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confidence: 99%

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Tunable metasurfaces towards versatile metalenses and metaholograms: a review

et al. 2022

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Metasurfaces have attracted great attention due to their ability to manipulate the phase, amplitude, and polarization of light in a compact form. Tunable metasurfaces have been investigated recently through the integration with mechanically moving components and electrically tunable elements. Two interesting applications, in particular, are to vary the focal point of metalenses and to switch between holographic images. We present the recent progress on tunable metasurfaces focused on metalenses and metaholograms, including the basic working principles, advantages, and disadvantages of each working mechanism. We classify the tunable stimuli based on the light source and electrical bias, as well as others such as thermal and mechanical modulation. We conclude by summarizing the recent progress of metalenses and metaholograms, and providing our perspectives for the further development of tunable metasurfaces.

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Section: Tunable Metalenses By Light Sourcementioning

confidence: 99%

Section: Tunable Metalenses By Electrical Biasmentioning

confidence: 99%

Section: Types Metalenses Metahologramsmentioning

confidence: 99%

mentioning

confidence: 99%

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Tunable metasurfaces towards versatile metalenses and metaholograms: a review

et al. 2022

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“…Consequently, it has a lot of potential for use in compact imaging devices. [110]. (B) The chiral meta-lenses are working.…”

Section: Reconfigurable and Tunable Metasurfacementioning

confidence: 99%

Recent Advancement in Optical Metasurface: Fundament to Application

2022

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Metasurfaces have gained growing interest in recent years due to their simplicity in manufacturing and lower insertion losses. Meanwhile, they can provide unprecedented control over the spatial distribution of transmitted and reflected optical fields in a compact form. The metasurfaces are a kind of planar array of resonant subwavelength components that, depending on the intended optical wavefronts to be sculpted, can be strictly periodic or quasi-periodic, or even aperiodic. For instance, gradient metasurfaces, a subtype of metasurfaces, are designed to exhibit spatially changing optical responses, which result in spatially varying amplitudes of scattered fields and the associated polarization of these fields. This paper starts off by presenting concepts of anomalous reflection and refraction, followed by a brief discussion on the Pancharatanm–Berry Phase (PB) and Huygens’ metasurfaces. As an introduction to wavefront manipulation, we next present their key applications. These include planar metalens, cascaded meta-systems, tunable metasurfaces, spectrometer retroreflectors, vortex beams, and holography. The review concludes with a summary, preceded by a perspective outlining our expectations for potential future research work and applications.

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3D Printed Spin‐Decoupled Transmissive Metasurfaces Based on Versatile Broadband Cross‐Polarization Rotation Meta‐Atom

Zhu

Yang

Wang

et al. 2023

Advanced Optical Materials

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This article proposes 3D printed broadband transmissive metasurfaces for spin‐decoupled wavefront shaping based on a versatile broadband cross‐polarization rotation meta‐atom. A meta‐atom combining broadband cross‐linear polarization dynamic phase and Pancharatnam–Berry (P–B) phase is demonstrated to realize spin‐decoupled beam shaping. The meta‐atom is built in an antenna‐circuit‐antenna fashion. Stacked patch antennas are used here as both the receiving and transmitting antennas because they can achieve wide bandwidth and good impedance matching to free space. By carefully selecting the phase delay lines’ path, the meta‐atom converts the x‐polarized or y‐polarized linear incident wave to its cross‐polarization with the co‐polarized components suppressed. The function also leads to the spin conversion for the circularly polarized incident wave. Thus, P–B phase‐shifting will be introduced when the meta‐atom is rotated. In addition, the transmission line provides the same dynamic phase delay for both left‐ and right‐hand circular polarization (LHCP and RHCP) incident waves. Then, combining the two different phase‐shifting methods, i.e., the P–B phase and dynamic phase, the LHCP and RHCP wavefront can be fully decoupled. Two different metasurfaces achieving spin‐decoupled anomalous refraction carrying orbital angular momentum (OAM) with different topological charges are simulated and experimentally verified for demonstration.

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Spin-decoupled metalens with intensity-tunable multiple focal points

Cited by 38 publications

References 64 publications

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Recent Advancement in Optical Metasurface: Fundament to Application

3D Printed Spin‐Decoupled Transmissive Metasurfaces Based on Versatile Broadband Cross‐Polarization Rotation Meta‐Atom

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