Giant birefringence in optical antenna arrays with widely tailorable optical anisotropy

The manipulation of light by conventional optical components such as lenses, prisms, and waveplates involves engineering of the wavefront as it propagates through an optically thick medium. A unique class of flat optical components with high functionality can be designed by introducing abrupt phase shifts into the optical path, utilizing the resonant response of arrays of scatterers with deeply subwavelength thickness. As an application of this concept, we report a theoretical and experimental study of birefringent arrays of two-dimensional (V- and Y-shaped) optical antennas which support two orthogonal charge-oscillation modes and serve as broadband, anisotropic optical elements that can be used to locally tailor the amplitude, phase, and polarization of light. The degree of optical anisotropy can be designed by controlling the interference between the waves scattered by the antenna modes; in particular, we observe a striking effect in which the anisotropy disappears as a result of destructive interference. These properties are captured by a simple, physical model in which the antenna modes are treated as independent, orthogonally oriented harmonic oscillators.

[1]  P. Biagioni,et al.  Near-field polarization shaping by a near-resonant plasmonic cross antenna , 2009 .

[2]  Peter Nordlander,et al.  Plasmon modes of nanosphere trimers and quadrumers. , 2006, The journal of physical chemistry. B.

[3]  A. Lezama,et al.  Steep anomalous dispersion in coherently prepared Rb vapor , 1999, quant-ph/9906019.

[4]  Zhen Peng,et al.  Flat dielectric grating reflectors with focusing abilities , 2010, 1001.3711.

[5]  G. Whitesides,et al.  Fabrication of large-area patterned nanostructures for optical applications by nanoskiving. , 2007, Nano letters.

[6]  J. Mcleod.  The Axicon: A New Type of Optical Element , 1954 .

[7]  F Schmidt,et al.  Magnetic metamaterials at telecommunication and visible frequencies. , 2005, Physical review letters.

[8]  D. Griffiths.  Introduction to Electrodynamics , 2017 .

[9]  Federico Capasso,et al.  Effect of radiation damping on the spectral response of plasmonic components. , 2011, Optics express.

[10]  Federico Capasso,et al.  Ultra-thin plasmonic optical vortex plate based on phase discontinuities , 2012 .

[11]  Federico Capasso,et al.  Out-of-plane reflection and refraction of light by anisotropic optical antenna metasurfaces with phase discontinuities. , 2012, Nano letters.

[12]  Nikolay I. Zheludev,et al.  Layered chiral metallic microstructures with inductive coupling , 2001 .

[13]  N. Zheludev,et al.  Optical manifestations of planar chirality. , 2003, Physical review letters.

[14]  Nobuhito Toyama,et al.  Generation of a doughnut-shaped beam using a spiral phase plate , 2004 .

[15]  D. Casasent,et al.  Spatial light modulators , 1977, Proceedings of the IEEE.

[16]  N. Yu,et al.  Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction , 2011, Science.

[17]  J. Greffet,et al.  Optical patch antennas for single photon emission using surface plasmon resonances. , 2010, Physical review letters.

[18]  Full Poincaré sphere coverage with plasmonic nanoslit metamaterials at Fano resonance , 2010 .

[19]  Federico Capasso,et al.  Modeling nanoscale V-shaped antennas for the design of optical phased arrays , 2012 .

[20]  A. Kildishev,et al.  Broadband Light Bending with Plasmonic Nanoantennas , 2012, Science.

[21]  Lukas Novotny,et al.  Effective wavelength scaling for optical antennas. , 2007, Physical review letters.

[22]  C. Noguez,et al.  Optical Properties of Elongated Noble Metal Nanoparticles , 2008 .

[23]  V. Kravets,et al.  Extremely narrow plasmon resonances based on diffraction coupling of localized plasmons in arrays of metallic nanoparticles. , 2008, Physical review letters.

[24]  Federico Capasso,et al.  Self-Assembled Plasmonic Nanoparticle Clusters , 2010, Science.

[25]  Y. Fainman,et al.  Metamaterials for enhanced polarization conversion in plasmonic excitation. , 2011, ACS nano.

[26]  T. Seideman,et al.  Nanoparticle Spectroscopy: Birefringence in Two-Dimensional Arrays of L-Shaped Silver Nanoparticles , 2008 .

[27]  F. Aussenegg,et al.  Optical dichroism of lithographically designed silver nanoparticle films. , 1996, Optics letters.

[28]  T. Nagao,et al.  Antenna Sensing of Surface Phonon Polaritons , 2010 .

[29]  George C Schatz,et al.  Silver nanoparticle array structures that produce remarkably narrow plasmon lineshapes. , 2004, The Journal of chemical physics.

[30]  H. Kikuta,et al.  Achromatic quarter-wave plates using the dispersion of form birefringence. , 1997, Applied optics.

[31]  Federico Capasso,et al.  Fabrication and replication of arrays of single- or multicomponent nanostructures by replica molding and mechanical sectioning. , 2010, ACS nano.

[32]  M. Sinclair,et al.  Strong coupling between nanoscale metamaterials and phonons. , 2011, Nano letters.