Electric and magnetic dipolar response of germanium nanospheres: interference effects, scattering anisotropy, and optical forces
R. Gómez-Medina,R. Gómez-Medina,Braulio García-Cámara,I. Suárez-Lacalle,Francisco González,Fernando Moreno,Manuel Nieto-Vesperinas,Juan José Sáenz +7 more
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TLDR
In this article, a wide window in the near-infrared (wavelengths 1t o 3μm) where light scattering by lossless submicrometer Ge spherical particles is fully described by their induced electric and magnetic dipoles was found.Abstract:
Thecoherentcombinationofelectricandmagneticresponsesisthebasisoftheelectro- magnetic behavior of new engineered metamaterials. The basic constituents of their meta-atoms usually have metallic character and consequently high absorption losses. Based on standard "Mie" scattering theory, we found that there is a wide window in the near-infrared (wavelengths 1t o 3μm), where light scattering by lossless submicrometer Ge spherical particles is fully described by their induced electric and magnetic dipoles. The interference between electric and magneticdipolarfieldsisshowntoleadtoanisotropicangulardistributionsofscatteredintensity, including zero backward and almost zero forward scattered intensities at specific wavelengths, which until recently was theoretically established only for hypothetically postulated magnetodi- electric spheres. Although the scattering cross section at zero backward or forward scattering is exactly the same, radiation pressure forces are a factor of 3 higher in the zero forward condition.read more
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Optically resonant dielectric nanostructures
Arseniy I. Kuznetsov,Andrey E. Miroshnichenko,Mark L. Brongersma,Yuri S. Kivshar,Boris Luk'yanchuk,Boris Luk'yanchuk +5 more
TL;DR: How high-index dielectric nanoparticles can offer a substitute for plasmonic nanoparticle structures, providing a highly flexible and low-loss route to the manipulation of light at the nanoscale is reviewed.
Journal ArticleDOI
Tailoring Directional Scattering through Magnetic and Electric Resonances in Subwavelength Silicon Nanodisks
Isabelle Staude,Andrey E. Miroshnichenko,Manuel Decker,Nche T. Fofang,Sheng Liu,Edward Gonzales,Jason Dominguez,Ting S. Luk,Dragomir N. Neshev,Igal Brener,Yuri S. Kivshar +10 more
TL;DR: It is demonstrated theoretically and experimentally that the interference of electric and magnetic optically induced modes in individual subwavelength silicon nanodisks can lead to the suppression of resonant backscattering and to enhanced resonant forward scattering of light.
Journal ArticleDOI
Directional visible light scattering by silicon nanoparticles
TL;DR: It is shown that directivity of the far-field radiation pattern of single silicon spheres can be strongly dependent on the light wavelength and the nanoparticle size.
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Recent advances in planar optics: from plasmonic to dielectric metasurfaces
Patrice Genevet,Federico Capasso,Francesco Aieta,Mohammadreza Khorasaninejad,Robert C. Devlin +4 more
TL;DR: In this paper, a classification of metasurfaces based on their different phase mechanisms and profiles and a comparison between plasmonic and dielectric surfaces is presented. And the authors place particular emphasis on the recent developments on electric and magnetic field control of light with Dielectric nanostructures and highlight the physical mechanisms and designs required for efficient all-dielectric metamaterials.
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Magnetic and electric coherence in forward- and back-scattered electromagnetic waves by a single dielectric subwavelength sphere
Jean-Michel Geffrin,Braulio García-Cámara,Braulio García-Cámara,R. Gómez-Medina,Pablo Albella,Luis S. Froufe-Pérez,Christelle Eyraud,Amelie Litman,Rodolphe Vaillon,Francisco González,Manuel Nieto-Vesperinas,Juan José Sáenz,Juan José Sáenz,Fernando Moreno +13 more
TL;DR: Experimental evidence is presented that a single low-loss dielectric subwavelength sphere of moderate refractive index radiates fields identical to those from equal amplitude crossed electric and magnetic dipoles, and indistinguishable from those of ideal magnetodielectric spheres, and these Kerker scattering conditions only depend on a/λ.
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