Tunable beam splitter using bilayer geometric metasurfaces in the visible spectrum

Wang, Chang; Liu, Siqi; Sun, Yan; Tao, Xiao; Sun, Peng; Zhang, Jinlei; Tao, Chenning; Wu, Rengmao; Wu, Fei; Zheng, Zhou

doi:10.1364/oe.402691

Cited by 14 publications

(12 citation statements)

References 46 publications

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“…TBML combines geometric phase ψ and propagation phase η. It is known that geometric metasurfaces impart opposite phase distributions for LCP and RCP incidences by rotating unit cells 23 , and propagation phase depends on the geometric parameters of the unit cells and insensitive to the polarization states of the incident light [26][27][28] . Assume a circularly polarized beam is incident on a nanostructure of geometric metasurfaces, the transmitted light can be expressed as = exp( 2 ) -, 22…”

Section: Theoretical Analysesmentioning

confidence: 99%

Continuous-zoom bifocal metalens at visible wavelength

Wang¹,

Zhang

Yu³

et al. 2023

Optoelectronic Imaging and Multimedia Technology IX

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Metasurfaces and metalenses have drawn great attentions since they can manipulate wavefront versatilely with a miniaturized and ultrathin configuration. Here we propose and numerically verify a tunable bifocal metalens with two continuous-zoom foci. This device utilizes two cascaded and circle layers of metasurfaces with different phase distributions for incidences of opposite helicities imparted on each layer by the combination of geometric phase and propagation phase. By relative rotation of both layers, focal lengths of both foci can be tuned continuously with the zoom range for each focus designed deliberately, and the relative intensity of both foci can be adjusted by changing the polarization state of incidence. The proposed device is anticipated to be applied in polarization imaging, depth estimation, multi-plane imaging, optical data storage, and so on.

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Section: Theoretical Analysesmentioning

confidence: 99%

Continuous-zoom bifocal metalens at visible wavelength

Wang¹,

Zhang

Yu³

et al. 2023

Optoelectronic Imaging and Multimedia Technology IX

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“…Many controllable beam splitters have been proposed in the past. They use either mechanical displacement of metasurfaces [29], electro-optical modulators and a Mach-Zehnder interferometer [30], optical bistability by surface plasmons [31], etc. Optically controlled beam splitters have been discussed.…”

Section: Appendix B An Optically Controlled Beam Splittermentioning

confidence: 99%

Modular quantum computing and quantum-like devices

Mendes

2021

Preprint

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The two essential ideas in this paper are, on the one hand, that a considerable amount of the power of quantum computation may be obtained by adding to a classical computer a few specialized quantum modules and, on the other hand, that such modules may be constructed out of classical systems obeying quantum-like equations where a space coordinate is the evolution parameter (thus playing the role of time in the quantum algorithms).

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“…Metasurfaces, arrays of subwavelength-spaced artificial nanostructures, have exhibited extraordinary capabilities of locally manipulating the phase, amplitude, and polarization of incident electromagnetic waves. Leveraging their adaptability and efficacy in wavefront shaping, metasurfaces hold the promise of downsizing optical components while enhancing their multifunctionality with high-quality performances and have drawn significant attention across diverse applications such as anomalous refraction and reflection [ 1 , 2 , 3 ], metalens [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ], generation of special light beams like Bessel beams and vortex beams [ 11 , 12 , 13 , 14 , 15 ], meta-hologram [ 16 , 17 , 18 ], wave plates [ 19 , 20 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Dual-Functional Tunable Metasurface for Meta-Axicon with a Variable Depth of Focus and Continuous-Zoom Metalens

Wang,

Sun,

et al. 2023

Nanomaterials

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Optical metasurfaces have been widely investigated for their versatile ability to manipulate wavefront and miniaturize traditional optical components into ultrathin planar devices. The integration of metasurfaces with multifunctionality and tunability has fundamentally transformed optics with unprecedented control over light propagation and manipulation. This study introduces a pioneering framework for the development of tunable metasurfaces with multifunctionality, and an example of a tunable metasurface of dual functionalities is proposed and numerically verified as one of the tunable meta-axicon for generating Bessel beams with a variable depth of focus (DOF) and a continuous-zoom metalens. Specifically, this design achieves dual-functional phase modulation by helicity-multiplexing from the combination of the geometric phase as well as the propagation phase and realizes tunability for both functionalities through rotational actuation between double metasurface layers. As a result, dual functionalities with continuous tunability of the proposed TiO2 metasurface are enabled independently for the left and right circularly polarized (LCP and RCP) incidences at 532 nm. Specifically, LCP light triggers the metasurface to function as a tunable axicon, generating non-diffracting Bessel beams with variable numerical apertures (NA) and DOFs. Conversely, the RCP incidence induces it to operate as a continuous-zoom metalens and generates variable spherical wavefront focusing on diverse focal lengths. This study not only initially implements the design of tunable meta-axicon, but also achieves the integration of such a tunable meta-axicon and continuous-zoom metalens within a single metasurface configuration. The proposed device could find potential applications in biological imaging, microscopic measurement, laser fabrication, optical manipulation, multi-plane imaging, depth estimation, optical data storage, etc.

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Tunable beam splitter using bilayer geometric metasurfaces in the visible spectrum

Cited by 14 publications

References 46 publications

Continuous-zoom bifocal metalens at visible wavelength

Continuous-zoom bifocal metalens at visible wavelength

Modular quantum computing and quantum-like devices

Dual-Functional Tunable Metasurface for Meta-Axicon with a Variable Depth of Focus and Continuous-Zoom Metalens

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