Tailoring directional scattering through magnetic and electric resonances in subwavelength silicon nanodisks.

Interference of optically induced electric and magnetic modes in high-index all-dielectric nanoparticles offers unique opportunities for tailoring directional scattering and engineering the flow of light. In this article we demonstrate 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. To this end we spectrally tune the nanodisk's fundamental electric and magnetic resonances with respect to each other by a variation of the nanodisk aspect ratio. This ability to tune two modes of different character within the same nanoparticle provides direct control over their interference, and, in consequence, allows for engineering the particle's resonant and off-resonant scattering patterns. Most importantly, measured and numerically calculated transmittance spectra reveal that backward scattering can be suppressed and forward scattering can be enhanced at resonance for the particular case of overlapping electric and magnetic resonances. Our experimental results are in good agreement with calculations based on the discrete dipole approach as well as finite-integral frequency-domain simulations. Furthermore, we show useful applications of silicon nanodisks with tailored resonances as optical nanoantennas with strong unidirectional emission from a dipole source.

[1]  Isabelle Rodriguez,et al.  Monodisperse silicon nanocavities and photonic crystals with magnetic response in the optical region , 2013, Nature Communications.

[2]  Arnan Mitchell,et al.  Dielectric resonator nanoantennas at visible frequencies. , 2013, Optics express.

[3]  Andrey E. Miroshnichenko,et al.  Directional visible light scattering by silicon nanoparticles , 2012, Nature Communications.

[4]  Lukas Novotny,et al.  Demonstration of zero optical backscattering from single nanoparticles. , 2012, Nano letters.

[5]  M. Wegener,et al.  Quantitative experimental determination of scattering and absorption cross-section spectra of individual optical metallic nanoantennas. , 2012, Physical review letters.

[6]  Y. Kivshar,et al.  Broadband scattering by tapered nanoantennas , 2012 .

[7]  Y. Kivshar,et al.  Cover Picture: Broadband scattering by tapered nanoantennas (Phys. Status Solidi RRL 12/2012) , 2012 .

[8]  Y. Kivshar,et al.  Fano Resonances in All-dielectric Oligomers , 2022 .

[9]  Nicolas Bonod,et al.  Boosting the directivity of optical antennas with magnetic and electric dipolar resonant particles. , 2012, Optics express.

[10]  Yuri S. Kivshar,et al.  All-dielectric optical nanoantennas. , 2012, Optics express.

[11]  B. Chichkov,et al.  Demonstration of magnetic dipole resonances of dielectric nanospheres in the visible region. , 2012, Nano letters.

[12]  Yuri S. Kivshar,et al.  Experimental verification of the concept of all-dielectric nanoantennas , 2012 .

[13]  B. Luk’yanchuk,et al.  Magnetic light , 2012, Scientific Reports.

[14]  Wei Liu,et al.  Broadband unidirectional scattering by magneto-electric core-shell nanoparticles. , 2012, ACS nano.

[15]  Yuri S. Kivshar,et al.  Optical Yagi-Uda nanoantennas , 2012, 1204.0330.

[16]  B. Chichkov,et al.  Optical properties of spherical gold mesoparticles , 2012 .

[17]  M. Sinclair,et al.  Realizing optical magnetism from dielectric metamaterials. , 2012, Physical review letters.

[18]  J. Sáenz,et al.  Angle-suppressed scattering and optical forces on submicrometer dielectric particles. , 2012, Journal of the Optical Society of America. A, Optics, image science, and vision.

[19]  S. Maier,et al.  Optically induced interaction of magnetic moments in hybrid metamaterials. , 2012, ACS nano.

[20]  F Moreno,et al.  Magnetic and electric coherence in forward- and back-scattered electromagnetic waves by a single dielectric subwavelength sphere , 2012, Nature Communications.

[21]  P. Spinelli,et al.  Broadband omnidirectional antireflection coating based on subwavelength surface Mie resonators , 2012, Nature Communications.

[22]  Boris N. Chichkov,et al.  Multipole light scattering by nonspherical nanoparticles in the discrete dipole approximation , 2011 .

[23]  M. Wegener,et al.  Past achievements and future challenges in the development of three-dimensional photonic metamaterials , 2011 .

[24]  Hai-Qing Lin,et al.  Observation of the Fano resonance in gold nanorods supported on high-dielectric-constant substrates. , 2011, ACS nano.

[25]  Y. Kivshar,et al.  An arrayed nanoantenna for broadband light emission and detection , 2011, 1107.3189.

[26]  M. Nieto-Vesperinas,et al.  Electric and magnetic dipolar response of germanium nanospheres: interference effects, scattering anisotropy, and optical forces , 2011, 1104.3363.

[27]  S. Maier,et al.  Plasmonic nanoantennas: fundamentals and their use in controlling the radiative properties of nanoemitters. , 2011, Chemical reviews.

[28]  R Alcaraz de la Osa,et al.  Directionality in scattering by nanoparticles: Kerker's null-scattering conditions revisited. , 2011, Optics letters.

[29]  P. Nordlander,et al.  The Fano resonance in plasmonic nanostructures and metamaterials. , 2010, Nature materials.

[30]  Giorgio Volpe,et al.  Unidirectional Emission of a Quantum Dot Coupled to a Nanoantenna , 2010, Science.

[31]  Boris N. Chichkov,et al.  Optical response features of Si-nanoparticle arrays , 2010 .

[32]  J. Aizpurua,et al.  Strong magnetic response of submicron silicon particles in the infrared. , 2010, Optics express.

[33]  Fernando Moreno,et al.  Light scattering by an array of electric and magnetic nanoparticles. , 2010, Optics express.

[34]  Nicolas Bonod,et al.  Compact metallo-dielectric optical antenna for ultra directional and enhanced radiative emission. , 2010, ACS nano.

[35]  A. Miroshnichenko,et al.  Off-resonance field enhancement by spherical nanoshells , 2010, 1002.2057.

[36]  Ji Zhou,et al.  Mie resonance-based dielectric metamaterials , 2009 .

[37]  Y. Kadoya,et al.  Directional control of light by a nano-optical Yagi–Uda antenna , 2009, 0910.2291.

[38]  M. Käll,et al.  Unidirectional ultracompact optical nanoantennas. , 2009, Nano letters.

[39]  Niels Verellen,et al.  Fano resonances in individual coherent plasmonic nanocavities. , 2009, Nano letters.

[40]  Peter Nordlander,et al.  Symmetry breaking in plasmonic nanocavities: subradiant LSPR sensing and a tunable Fano resonance. , 2008, Nano letters.

[41]  Lukas Novotny,et al.  Principles of Nano-Optics by Lukas Novotny , 2006 .

[42]  L. Zschiedrich,et al.  Magnetic metamaterials at telecommunication and visible frequencies. , 2005, Physical review letters.

[43]  B. Draine,et al.  Discrete-Dipole Approximation For Scattering Calculations , 1994 .

[44]  P. Barber.  Absorption and scattering of light by small particles , 1984 .

[45]  C. Lee Giles,et al.  Electromagnetic scattering by magnetic spheres , 1983 .

[46]  Stuart A. Long,et al.  The resonant cylindrical dielectric cavity antenna , 1983 .