Diffractive stacks of metamaterial lattices with a complex unit cell: Self-consistent long-range bianisotropic interactions in experiment and theory

Kwadrin, Andrej; Koenderink, A. Femius

doi:10.1103/physrevb.89.045120

Cited by 24 publications

(22 citation statements)

References 33 publications

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“…Fourier imaging has been applied, for instance, to image the radiation pattern of single emitters to determine their dipole moment 21 22 and to map the directivity optical antennas impart to emitters 30 36 37 38 . Fourier microscopes have been also used in scattering experiments on single nanostructures 39 and nanostructure arrays 40 41 42 43 . The back focal plane in a Fourier microscope retains full information regarding momentum, but also in other degrees of freedom such as energy (frequency) and polarization.…”

Section: K-space Polarimetrymentioning

confidence: 99%

K-space polarimetry of bullseye plasmon antennas

Osorio

Mohtashami

Koenderink

2015

Sci Rep

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Surface plasmon resonators can drastically redistribute incident light over different output wave vectors and polarizations. This can lead for instance to sub-diffraction sized nanoapertures in metal films that beam and to nanoparticle antennas that enable efficient conversion of photons between spatial modes, or helicity channels. We present a polarimetric Fourier microscope as a new experimental tool to completely characterize the angle-dependent polarization-resolved scattering of single nanostructures. Polarimetry allows determining the full Stokes parameters from just six Fourier images. The degree of polarization and the polarization ellipse are measured for each scattering direction collected by a high NA objective. We showcase the method on plasmonic bullseye antennas in a metal film, which are known to beam light efficiently. We find rich results for the polarization state of the beamed light, including complete conversion of input polarization from linear to circular and from one helicity to another. In addition to uncovering new physics for plasmonic groove antennas, the described technique projects to have a large impact in nanophotonics, in particular towards the investigation of a broad range of phenomena ranging from photon spin Hall effects, polarization to orbital angular momentum transfer and design of plasmon antennas.

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Section: K-space Polarimetrymentioning

confidence: 99%

K-space polarimetry of bullseye plasmon antennas

Osorio

Mohtashami

Koenderink

2015

Sci Rep

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“…This, in addition to providing a response stronger than that of a single nanostructure, can also lead to collective behaviors arising from coherent interactions between the nanostructures [21][22][23]. That is the case for so-called lattice resonances, which occur at wavelengths commensurable with the periodicity of the array [24][25][26][27][28][29][30]62], and have particularly strong and narrow spectral features that make them ideal for the previously mentioned applications [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Finite-size effects on periodic arrays of nanostructures

Zundel

Manjavacas

2018

J. Phys. Photonics

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Arrays of nanostructures have emerged as exceptional tools for the manipulation and control of light. Oftentimes, despite the fact that real implementations of nanostructure arrays must be finite, these systems are modeled as perfectly periodic, and therefore infinite. Here, we investigate the legitimacy of this approximation by studying the evolution of the optical response of finite arrays of nanostructures as their number of elements is increased. We find that the number of elements necessary to reach the infinite array limit is determined by the strength of the coupling between them, and that, even when that limit is reached, the individual responses of the elements may still display significant variations. In addition, we show that, when retardation is negligible, the resonance frequency for the infinite array is always redshifted compared to the single particle. However, in the opposite situation, there could be either a blue-or a redshift. We also study the effects of inhomogeneity in size and position of the elements on the optical response of the array. This work advances the understanding of the behavior of finite and infinite arrays of nanostructures, and therefore provides guidance to design applications that utilize these systems.

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“…Hence, a systematic analysis of structures that exhibit unchanging brightfield colors while varying darkfield colors due to small variations in the positioning of disks in the array is here needed. A few previous studies had also discussed the optical response of fixed clusters of resonators, but the focus was on simple metallic nanostructures rather than on gap plasmonic resonators [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Darkfield colors from multi-periodic arrays of gap plasmon resonators

Krishnan

Wang

et al. 2019

Nanophotonics

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We present results on colors of metal disk arrays viewed under a darkfield microscope and show that the darkfield colors can be manipulated independently of the brightfield colors. We investigate the appearance of colors as disks are clustered to form a new array with double the pitch and a basis of four disks. These structures of aluminum disks on aluminum oxide on aluminum have resonances in the visible spectrum, so by arranging them in small tight clusters, a coupled plasmon resonant mode is produced at shorter wavelengths. This feature causes a reflectance minimum and leads to an increase in the gamut of darkfield colors produced. These colors are tuned by changing the size of the disk and the inter-disk gap within the clusters. Interestingly, the intensities of the reflectance peaks also demonstrate good agreement with the Fourier series coefficients for square waves. Polarization-tunable colors are also demonstrated by designing rectangular arrays that have dissimilar periods along the two orthogonal axes of the array, and a four-level security tag is fabricated that encodes images for viewing under brightfield, darkfield (both x and y polarization), and infrared illumination.

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Diffractive stacks of metamaterial lattices with a complex unit cell: Self-consistent long-range bianisotropic interactions in experiment and theory

Cited by 24 publications

References 33 publications

K-space polarimetry of bullseye plasmon antennas

K-space polarimetry of bullseye plasmon antennas

Finite-size effects on periodic arrays of nanostructures

Darkfield colors from multi-periodic arrays of gap plasmon resonators

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