Breaking the Symmetry of Forward-Backward Light Emission with Localized and Collective Magnetoelectric Resonances in Arrays of Pyramid-Shaped Aluminum Nanoparticles

Rodriguez, S. R. K.; Arango, Felipe Bernal; Steinbusch, T. P.; Verschuuren, Marc A.; Koenderink, A. Femius; Rivas, Jaime Gómez

doi:10.1103/physrevlett.113.247401

Cited by 47 publications

(42 citation statements)

References 57 publications

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“…1) is chosen because it is a generic asymmetric configuration for controlling the two most significant lowest-order multipole moments, the electric-current quadrupole and electric dipole moments, independently of the polarization of the incident field [19,[29][30][31]. Similar interaction effects, such as asymmetric optical scattering and reflection, have been reported in regard to asymmetric nanoscatterers [32][33][34][35] and metasurfaces in the infrared [36][37][38] and microwave [39] spectral ranges.…”

Section: Introductionmentioning

confidence: 88%

Bifacial Metasurface with Quadrupole Optical Response

et al. 2015

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We design, fabricate, and characterize a metasurface, whose multipole optical response depends significantly on the illumination direction. The metasurface is composed of gold-nanodisc dimers embedded in glass. In spite of their nanoscale size, the dimers exhibit a dominating electric-currentquadrupole response in a wide range of wavelengths around 700 nm when illuminated from one side, and a primarily electric-dipole response when illuminated from the opposite side. This leads to two consequences. First, the reflection coefficient of the metasurface considerably differs for the two sides of illumination. Second, quadrupole excitation results in a significant local enhancement of both electric and magnetic fields around the dimers. Our experimental spectroscopic data are in good agreement with simulations obtained using a multipole expansion model.

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Section: Introductionmentioning

confidence: 88%

Bifacial Metasurface with Quadrupole Optical Response

et al. 2015

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“…[20][21][22] Here, we report on the forward emission from quasi-guided modes in polymer layers containing dye molecules. We describe how the emission spectrum of the system is changed by varying the thickness of the waveguide.…”

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confidence: 99%

Luminescent Metamaterials for Solid State Lighting

Nikitin

Remezani

Rivas

2015

ECS J. Solid State Sci. Technol.

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We investigate the luminescent spectrum of thin films of dye molecules embedded in a polymer layer and on top of an array of aluminum nanoparticles. The emission couples to quasi-guided modes that are efficiently coupled out to free space by scattering with the particle array. This outcoupling provides a significant enhancement of the emission in defined directions. The mode density changes and the spectrum is modified by varying the thickness of the layer. In consequence, the luminous efficacy of the layer of dye can be controlled by the layer thickness and the characteristics of the particle array. This system can be regarded as a luminescent metamaterial with designed properties that can be exploited in The invention of the efficient blue Light Emitting Diode (LED) 1 has led to the Solid State Lighting (SSL) revolution that will replace inefficient incandescent and fluorescent lamps by much more efficient light sources. Blue light is necessary for the generation of broadband white light. In a white LED this generation is usually realized through a luminescent or phosphorescent material, which is called the phosphor.2 Blue light from efficient InGaN quantum wells is absorbed by the phosphor, which emits light of a longer wavelength. White light is generated by mixing the emission of the phosphor with the fraction of non-absorbed blue light. Research on light generation in white LEDs has mainly focused on the improvement of the quantum efficiency of the phosphor by modifying the material composition and on the change of the emission spectrum in order to optimally match it to the photopic sensitivity curve of the eye. 3In this article we demonstrate a radically different approach to modify the emission intensity and spectrum of phosphors for SSL. This approach relies on coupling the emission to quasi-guided modes in the phosphor layers. These modes are very efficiently outcoupled to free space radiation by scattering with periodic arrays of metallic nanoparticles. Metallic nanoparticles support localized surface plasmon polaritons (LSPPs), which are the coherent oscillations of the free charges in the metal driven by the electromagnetic field. 4 LSPPs are resonant phenomena leading to the increase of the polarizability of the particle and, consequently, to the scattering efficiency. 5 In order to use resonant plasmonic nanoparticles in real applications, we need to have large arrays or ensembles of these nanostructures. Therefore, we investigate the modification of the emission from phosphor layers on top of periodic arrays of metallic nanoparticles. These and similar arrays have received recently a significant attention because of their capacity of supporting collective plasmonic resonances. These collective resonances are the result of the enhanced radiative coupling of LSPPs through scattering and diffraction by the particle array. Two different kinds of collective resonances in periodic arrays of plasmonic particles have been described in the literature. 6 The first kind arises in waveguides with the particl...

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“…beyond the electric dipole moment [5][6][7]. Varying size, shape, and material of nanoantennas causes intriguing scattering effects that rely on the interference of these resonances such as superscattering [7,8], cloaking [9,10], a control of the polarization state of radiation [11], or enhanced directionality in the scattering response [12][13][14][15][16][17][18][19]. Especially the latter function is extremely exciting considering application perspectives, for which an optical wireless nanoantenna link is a prominent example [20].…”

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confidence: 99%

“…Various nanoantennas have been investigated that exhibit such higher order multipole moments to achieve a directional response [12,[25][26][27]. We study the application of the generalized Kerker condition to a plasmonic nanoring antenna.…”

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confidence: 99%

A generalized Kerker condition for highly directive nanoantennas

et al. 2015

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A nanoantenna with balanced electric and magnetic dipole moments, known as the first Kerker condition, exhibits a directive radiation pattern with zero backscattering. In principle, a nanoantenna can provide even better directionality if higher order moments are properly balanced. Here, we study a generalized Kerker condition at the example of a nanoring nanontenna supporting electric dipole and electric quadrupole moments. Nanoring antennas are well suited since both multipole moments can be almost independently tuned to meet the generalized Kerker condition.

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Breaking the Symmetry of Forward-Backward Light Emission with Localized and Collective Magnetoelectric Resonances in Arrays of Pyramid-Shaped Aluminum Nanoparticles

Abstract: (2014). Breaking the symmetry of forward-backward light emission with localized and collective magnetoelectric resonances in arrays of pyramid-shaped aluminum nanoparticles. Physical Review Letters, 113(24), 247401-1/5.

Cited by 47 publications

References 57 publications

Bifacial Metasurface with Quadrupole Optical Response

Bifacial Metasurface with Quadrupole Optical Response

Luminescent Metamaterials for Solid State Lighting

A generalized Kerker condition for highly directive nanoantennas

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