Arbitrary focusing lens by holographic metasurface

Li, Rongzhen; Guo, Zhongyi; Wang, Wei; Zhang, Jingran; Zhou, Keya; Liu, Jianlong; Qu, Shiliang; Liu, Shutian; Gao, Jun

doi:10.1364/prj.3.000252

Cited by 44 publications

(31 citation statements)

References 20 publications

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“…A metasurface consisting of subwavelength arrays makes surface-integrated photonics possible and provides an exciting platform for ultrathin optics or flat optics [1,2]. Because of the advantages of ultrathin thickness, low weight, ease-offabrication, and high efficiency, metasurfaces have gained wide attention, and different varieties of metasurfaces have applications in light manipulation, such as beam-steering devices [3], holography plates [4,5], ultrathin lenses [6,7], and invisibility cloaks [8], which are realized through controlling the amplitude, phase, and polarization of light.…”

Section: Introductionmentioning

confidence: 99%

Conversion between polarization states based on a metasurface

et al. 2019

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Transmission of an anisotropic metasurface is analyzed in a polar base relying on the Jones calculus, and polarization conversion from the spatial uniform polarization to the spatial nonuniform polarization is explored. Simple and compact polarization converters based on rectangular holes or cross holes etched in silver film are designed, and polarization conversions from the linear and circular polarization to the radial and azimuthal polarization are realized. Numerical simulations of three designed polarization converters consisting of rectangular holes equivalent to polarizers and quarter-and half-wave plates, exhibit the perfect polarization conversion. The experiment results consistent with the simulations verify theoretic predictions. This study is helpful for designing metasurface polarization converters and expanding the application of a metasurface in polarization manipulations.

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Section: Introductionmentioning

confidence: 99%

Conversion between polarization states based on a metasurface

et al. 2019

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“…A myriad of metasurface devices have been previously demonstrated, including beam shapers, polarizers, and lenses, referred to as metalenses . Previous work, either metallic(plasmon‐based) or, more recently, dielectric‐based metasurfaces, generally aim to mimic functionality of conventional broadband optical elements but through ultrathin form factors, termed flat optics . However, utilization of the unique optical properties of metallic‐or‐dielectric‐based nanoscale resonators—such as strong wavelength or polarization dependence—in combination with well established DOEs, for more elaborate design schemes, has great potential.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Metalens for Narrowband Dual‐Focus Imaging

Williams

Montelongo

Wilkinson

2017

Advanced Optical Materials

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toolbox for a plethora of applications in reduced form factors. [2] With the continual shrinking of optical systems-from the macro-to-micro optical realms [2] -the inevitable form factor reduction of DOEs leads to two important disadvantages, which arise from their diffractive nature. The first is a result of the relatively large dimensions necessary to observe diffraction. According to the geometrical theory of diffraction (GTD), [3] to observe a considerable wave perturbation, features with dimensions ⩾ λ/2 are necessary. Although the GTD predicts arbitrary numerical apertures (NA), the physical dimension to produce diffraction imposes a physical constraint. [4] The second disadvantage arises from the lack of functionality of the diffractive structures, which are restricted in order to create constructive interference at the focal point. In recent years, the advent of nanophotonic devices-based on the control of the optical wavefront over subwavelength length scales-has opened up a new class of planar optical element: the metasurface. [5][6][7][8][9] Optical metasurfaces present a route toward enhancing the DOE further, whereby the control of highly localized optical fields across the element can impart additional optical functionality such as amplitude, wavelength, polarization, and phase modulation. [5,6,9,10] The unique light-matter interaction with nanostructured metals leads to the excitation of localized surface plasmon polari tons, resulting in highly pronounced and tunable scattering cross-sections. [5,[11][12][13] With noble metals, this behavior occurs at visible wavelengths [12,14] and through tailored arrays of such subwavelength scatterers (metasurfaces) arbitrary control of the optical wavefront is possible. A myriad of metasurface devices have been previously demonstrated, including beam shapers, polarizers, and lenses, referred to as metalenses. [9,[15][16][17][18] Previous work, either metallic(plasmon-based) or, more recently, dielectric-based metasurfaces, generally aim to mimic functionality of conventional broadband optical elements but through ultrathin form factors, termed flat optics. [8,9,[19][20][21] However, utilization of the unique optical properties of metallic-or-dielectricbased nanoscale resonators [9] -such as strong wavelength or polarization dependence-in combination with well established DOEs, for more elaborate design schemes, has great potential.In this work, we introduce a plasmonic-enhanced metalens which has the ability to selectively focus light of a certain wavelength, to two different focal planes, depending on polarization state. Through tailored arrays of ultrathin plasmonic nanostructures on silicon, we experimentally demonstrate two types of reflective metalens: a Fresnel zone plate and a photon sieve; with dual-focusing capability, dependent

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“…momentum modes, 10,24 implementation of various kinds of elements for polarization discrimination, [25][26][27] elements with chiral or holographic properties, 28,29 and devices for focussing and shaping of beams. [29][30][31][32] Slot-type nanoboomerangs have been used for electro-optical switching.…”

Section: Introductionmentioning

confidence: 99%

“…[29][30][31][32] Slot-type nanoboomerangs have been used for electro-optical switching. 33 A comparable approach was used in the terahertz frequency region for planar electric split ring resonators.…”

Section: Introductionmentioning

confidence: 99%

Nanoboomerang-based inverse metasurfaces—A promising path towards ultrathin photonic devices for transmission operation

et al. 2017

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Ultra-compact visible chiral spectrometer with meta-lenses APL Photonics 2, 036103 (2017) Metasurfaces have revolutionized photonics due to their ability to shape phase fronts as requested and to tune beam directionality using nanoscale metallic or dielectric scatterers. Here we reveal inverse metasurfaces showing superior properties compared to their positive counterparts if transmission mode operation is considered. The key advantage of such slot-type metasurfaces is the strong reduction of light in the parallel-polarization state, making the crossed-polarization, being essential for metasurface operation, dominant and highly visible. In the experiment, we show an up to four times improvement in polarization extinction for the individual metasurface element geometry consisting of deep subwavelength nanoboomerangs with feature sizes of the order of 100 nm. As confirmed by simulations, strong plasmonic hybridization yields two spectrally separated plasmonic resonances, ultimately allowing for the desired phase and scattering engineering in transmission. Due to the design flexibility of inverse metasurfaces, a large number of highly integrated ultra-flat photonic elements can be envisioned, examples of which include monolithic lenses for telecommunications and spectroscopy, beam shaper or generator for particle trapping or acceleration or sophisticated polarization control for microscopy. © 2017 Author (s)

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Arbitrary focusing lens by holographic metasurface

Cited by 44 publications

References 20 publications

Conversion between polarization states based on a metasurface

Conversion between polarization states based on a metasurface

Plasmonic Metalens for Narrowband Dual‐Focus Imaging

Nanoboomerang-based inverse metasurfaces—A promising path towards ultrathin photonic devices for transmission operation

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