Thickness bound for nonlocal wide-field-of-view metalenses

Li, Shiyu; Hsu, Chia Wei

doi:10.1038/s41377-022-01038-6

Cited by 28 publications

(21 citation statements)

References 90 publications

(126 reference statements)

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“…The angular memory effect stipulates that the metasurface optics must be sufficiently thick to accommodate a phase profile that sensitively depends on the AOI. Li et al 97 . formulated a lower bound of metalens thickness L for diffraction-limited WFOV metalenses defined in terms of the lens NA, angular FOV (in radians), and the output aperture size s, L∼(13NA)·s·sin(π2 sin FOV2).…”

Section: Optical Metasurfaces: All Roads That Lead To Wfov Opticsmentioning

confidence: 99%

Wide field-of-view metalens: a tutorial

Shalaginov

Lin

et al. 2023

Adv. Photon.

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.Wide field-of-view (FOV) optics are essential components in many optical systems, with applications spanning imaging, display, sensing, and beam steering. Conventional refractive wide FOV optics often involve multiple stacked lenses, resulting in large size and weight as well as high cost. Metasurface lenses or metalenses promise a viable solution to realizing wide FOV optics without complex lens assembly. We review the various architectures of wide FOV metalenses, elucidate their fundamental operating principles and design trade-offs, and quantitatively evaluate and contrast their imaging performances. Emerging applications enabled by wide FOV metasurface optics are also discussed.

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Section: Optical Metasurfaces: All Roads That Lead To Wfov Opticsmentioning

confidence: 99%

Wide field-of-view metalens: a tutorial

Shalaginov

Lin

et al. 2023

Adv. Photon.

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“… Fundamentals of meta-optics, meta-devices and applications. Overview of the recent development of meta-optics, including the control principle, meta-devices, and further meta-imaging [ 100 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 ]. …”

Section: Figurementioning

confidence: 99%

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Wan

Wang

et al. 2023

Nanomaterials

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Meta-optics based on metasurfaces that interact strongly with light has been an active area of research in recent years. The development of meta-optics has always been driven by human’s pursuits of the ultimate miniaturization of optical elements, on-demand design and control of light beams, and processing hidden modalities of light. Underpinned by meta-optical physics, meta-optical devices have produced potentially disruptive applications in light manipulation and ultra-light optics. Among them, optical metalens are most fundamental and prominent meta-devices, owing to their powerful abilities in advanced imaging and image processing, and their novel functionalities in light manipulation. This review focuses on recent advances in the fundamentals and applications of the field defined by excavating new optical physics and breaking the limitations of light manipulation. In addition, we have deeply explored the metalenses and metalens-based devices with novel functionalities, and their applications in computational imaging and image processing. We also provide an outlook on this active field in the end.

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“…The alternatives all have limitations: the Born approximation does not describe multiple scattering, radiative transport and diagrammatic methods can only compute some ensemble-averaged properties 2 and coupled-mode theory requires systems with isolated resonances 3,4 . For metasurfaces 5 , the widely used locally periodic approximation 5,6 is inaccurate whenever the cell-to-cell variation is large [7][8][9] and cannot describe nonlocal responses 10 or metasurfaces that are not based on unit cells 11,12 .…”

Section: Ho-chun Lin Zeyu Wang and Chia Wei Hsumentioning

confidence: 99%

Fast multi-source nanophotonic simulations using augmented partial factorization

2022

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Numerical solutions of Maxwell’s equations are indispensable for nanophotonics and electromagnetics but are constrained when it comes to large systems, especially multi-channel ones such as disordered media, aperiodic metasurfaces and densely packed photonic circuits where the many inputs require many large-scale simulations. Conventionally, before extracting the quantities of interest, Maxwell’s equations are first solved on every element of a discretization basis set that contains much more information than is typically needed. Furthermore, such simulations are often performed one input at a time, which can be slow and repetitive. Here we propose to bypass the full-basis solutions and directly compute the quantities of interest while also eliminating the repetition over inputs. We do so by augmenting the Maxwell operator with all the input source profiles and all the output projection profiles, followed by a single partial factorization that yields the entire generalized scattering matrix via the Schur complement, with no approximation beyond discretization. This method applies to any linear partial differential equation. Benchmarks show that this approach is 1,000–30,000,000 times faster than existing methods for two-dimensional systems with about 10,000,000 variables. As examples, we demonstrate simulations of entangled photon backscattering from disorder and high-numerical-aperture metalenses that are thousands of wavelengths wide.

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Thickness bound for nonlocal wide-field-of-view metalenses

Cited by 28 publications

References 90 publications

Wide field-of-view metalens: a tutorial

Wide field-of-view metalens: a tutorial

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Fast multi-source nanophotonic simulations using augmented partial factorization

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