Dual-polarity plasmonic metalens for visible light

Chen, Xianzhong; Huang, Lingling; Mühlenbernd, Holger; Li, Guixin; Bai, Benfeng; Tan, Qiaofeng; Jin, Guofan; Qiu, Cheng‐Wei; Zhang, Shuang; Zentgraf, Thomas

doi:10.1038/ncomms2207

Cited by 1,051 publications

(752 citation statements)

References 25 publications

Supporting

Mentioning

746

Contrasting

Unclassified

Order By: Relevance

“…The experimental results show that the normally incident terahertz wave could be deflected to an angle as large as 72° with 40% efficiency, which is significantly better than the previously reported results realized by the conventional reflectarray even at microwave frequency 42. Owning to the existence of Fourier transform relation between the coding pattern and far‐field pattern, the coding metasurfaces can be studied from a fully digital perspective, enabling more versatile manipulations to scattering patterns, and therefore have the potential to be applied in many terahertz devices such as metalens,4, 43 metaholography,44, 45 and spoof surface plasmon polariton devices 9, 12, 46…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…As 2D artificially engineered structures,1, 2, 3 metasurfaces have attracted great attention in physics and engineering communities owing to a number of unique properties 4, 5, 6, 7, 8, 9, 10, 11, 12. A metasurface is formed by distributing subwavelength resonant particles with different geometries and materials on a 2D surface, and therefore is able to manipulate both amplitudes and phases of electromagnetic (EM) waves, enabling many extraordinary functionalities such as the polarization conversion,,13, 14, 15, 16, 17 perfect absorption,18, 19, 20 and amplitude and phase modulations 21, 22.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Convolution Operations on Coding Metasurface to Reach Flexible and Continuous Controls of Terahertz Beams

et al. 2016

View full text Add to dashboard Cite

The concept of coding metasurface makes a link between physically metamaterial particles and digital codes, and hence it is possible to perform digital signal processing on the coding metasurface to realize unusual physical phenomena. Here, this study presents to perform Fourier operations on coding metasurfaces and proposes a principle called as scattering‐pattern shift using the convolution theorem, which allows steering of the scattering pattern to an arbitrarily predesigned direction. Owing to the constant reflection amplitude of coding particles, the required coding pattern can be simply achieved by the modulus of two coding matrices. This study demonstrates that the scattering patterns that are directly calculated from the coding pattern using the Fourier transform have excellent agreements to the numerical simulations based on realistic coding structures, providing an efficient method in optimizing coding patterns to achieve predesigned scattering beams. The most important advantage of this approach over the previous schemes in producing anomalous single‐beam scattering is its flexible and continuous controls to arbitrary directions. This work opens a new route to study metamaterial from a fully digital perspective, predicting the possibility of combining conventional theorems in digital signal processing with the coding metasurface to realize more powerful manipulations of electromagnetic waves.

show abstract

Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Convolution Operations on Coding Metasurface to Reach Flexible and Continuous Controls of Terahertz Beams

et al. 2016

View full text Add to dashboard Cite

show abstract

“…It is a promising way to manipulate electromagnetic (EM) wave propagation because of the designable feature of its surface impedance, which uniquely determines the EM field behavior. Many novel metasurface devices have been proposed so far, such as planar chiral plates [10], holography [11], spin-controlled photonics [12], wave orbital angular momentum manipulations [13][14][15][16], polarization converters and quarter-wave plates [17,18], flat lens and focusing [19][20][21][22], and Huygens metasurfaces [23,24].…”

Section: Introductionmentioning

confidence: 99%

Surface Impedance Synthesis Using Parallel Planar Electric Metasurfaces

Zhu¹

2017

PIER

View full text Add to dashboard Cite

Abstract-Metasurfaces, due to its designable surface electric and magnetic impedances, have largely enhanced electromagnetic wave manipulation techniques. The conventional approach to realize the surface magnetic impedance requires non-planar structures, such as metallic loops, which is not easy to fabricate, especially at optical frequencies. In this work, we theoretically and rigorously prove that effective surface magnetic and electric impedances can be obtained using parallel electric metasurfaces. A synthesis method is presented which allows independent designs of surface electric and magnetic impedances. Finally, a polarization converter with high energy efficiency is designed using the proposed impedance synthesis method for verification. The proposed synthesis method is favorable for reducing fabrication complexities.

show abstract

“…Bragg scattering) of photonic crystals, a wellperformed device is in need of large-area size so as to functionalize the zero-index properties. This is why we prefer large-area device.Recent developments of metasurface-based flat lens have revealed many outstanding capabilities to manipulate the phase of light in micro-nano scale by using optical resonators with discrete phase distribution [20][21][22][23][24][25][26] . It is concentrated on out-of-plane operation that the propagating waves are vertical to the chip.…”

mentioning

confidence: 99%

Realization of Zero-Refractive-Index Lens with Ultralow Spherical Aberration

He¹,

Huang²,

Chang³

et al. 2016

ACS Photonics

View full text Add to dashboard Cite

Optical complex materials offer unprecedented opportunity to engineer fundamental band dispersion which enables novel optoelectronic functionality and devices. Exploration of photonic Dirac cone at the center of momentum space has inspired an exceptional characteristic of zero-index, which is similar to zero effective mass in fermionic Dirac systems. Such all-dielectric zero-index photonic crystals provide an in-plane mechanism such that the energy of the propagating waves can be well confined along the chip direction. A straightforward example is to achieve the anomalous focusing effect without longitudinal spherical aberration, when the size of zero-index lens is large enough. Here, we designed and fabricated a prototype of zero-refractive-index lens by comprising large-area silicon nanopillar array with plane-concave profile. Near-zero refractive index was quantitatively measured near 1.55 m through anomalous focusing effect, predictable by effective medium 2 theory. The zero-index lens was also demonstrated to perform ultralow longitudinal spherical aberration. Such IC compatible device provides a new route to integrate all-silicon zero-index materials into optical communication, sensing, and modulation, and to study fundamental physics on the emergent fields of topological photonics and valley photonics.Dirac cones in fermionic systems have attracted tremendous attention in the fields of topological insulator and graphene [1][2][3] . Following the pace of condensed matter, these conical dispersion bands have been extended to bosonic systems particularly for electromagnetic waves 4-12 . Bosonic Dirac cones at the zone boundary reveal many similar phenomena with fermionic particles. For example, bianisotropic metamaterials can access to modulate the spin flow of light with backscattering immune at the boundary of topological photonic crystals, after opening a nontrivial gap from Dirac cone 13,8,11 . An alternative method is proposed to implement photonic analogue of the integer quantum Hall effect by using periodic coupling resonators on a silicon-on-insulator platform in near-infared (NIR) wavelength scale 7,14,15 .Beyond those predominant behaviors, bosonic Dirac cones also present extra features other than femionic systems. Recently, another type of photonic Dirac cones induced by accidental degeneracy at the zone center has been found in a class of all-dielectric photonic crystals 16,17 , in which the optical response shows very different to the case at the zone boundary. One of the remarkable properties is zero-index behavior such that the effective permittivity and permeability are simultaneously to be zero at Dirac frequency. To date, nanorod-array structure is the exclusive way to realize all-dielectric zero-index photonic crystal in optical frequency regime. How to sufficiently confine the propagation wave in the plane of periodicity is a practical challenge for 3 rod-slab structures. The first implementation at near-infrared (NIR) wavelength has been fabricated by alternating silicon/silica layers ...

show abstract

Dual-polarity plasmonic metalens for visible light

Cited by 1,051 publications

References 25 publications

Convolution Operations on Coding Metasurface to Reach Flexible and Continuous Controls of Terahertz Beams

Convolution Operations on Coding Metasurface to Reach Flexible and Continuous Controls of Terahertz Beams

Surface Impedance Synthesis Using Parallel Planar Electric Metasurfaces

Realization of Zero-Refractive-Index Lens with Ultralow Spherical Aberration

Contact Info

Product

Resources

About