Nonlocal optical response of metal nanostructures with arbitrary shape.

We present an implementation of Maxwell's equations that incorporates the spatially nonlocal response of materials, an effect necessary to describe the optical properties of structures with features less than 10 nm. For the first time it is possible to investigate the nonlocal optical response of structures without spherical or planar shape, and outside of the electrostatic limit. As an illustration, we calculate the optical properties of Au nanowires and show that nonlocal effects are particularly important in structures with apex features, even for arbitrarily large sizes.

[1]  L. Reining,et al.  Ab initio study of the dielectric response of crystalline ropes of metallic single-walled carbon nanotubes: Tube-diameter and helicity effects , 2008 .

[2]  V. Yannopapas.  Non-local optical response of two-dimensional arrays of metallic nanoparticles , 2008 .

[3]  Lukas Novotny,et al.  Blue-shifted plasmon resonance of individual size-selected gold nanoparticles , 2008 .

[4]  F. D. Abajo,et al.  Nonlocal Effects in the Plasmons of Strongly Interacting Nanoparticles, Dimers, and Waveguides , 2008, 0802.0040.

[5]  N. Stefanou,et al.  Collective plasmonic modes in ordered assemblies of metallic nanoshells , 2008 .

[6]  Philippe Guyot-Sionnest,et al.  Optical properties of rodlike and bipyramidal gold nanoparticles from three-dimensional computations , 2007 .

[7]  R. V. Van Duyne,et al.  Localized surface plasmon resonance spectroscopy and sensing. , 2007, Annual review of physical chemistry.

[8]  Railing Chang,et al.  Nonlocal effects on optical and molecular interactions with metallic nanoshells , 2006 .

[9]  Philippe Guyot-Sionnest,et al.  Synthesis and Optical Characterization of Au/Ag Core/Shell Nanorods , 2004 .

[10]  George C. Schatz,et al.  Surface plasmon broadening for arbitrary shape nanoparticles: A geometrical probability approach , 2003 .

[11]  Stephen K. Gray,et al.  Propagation of light in metallic nanowire arrays: Finite-difference time-domain studies of silver cylinders , 2003 .

[12]  R. Wannemacher,et al.  Failure of local Mie theory: optical spectra of colloidal aggregates , 2001 .

[13]  J. Kottmann,et al.  Spectral response of plasmon resonant nanoparticles with a non-regular shape. , 2000, Optics express.

[14]  P. Halevi,et al.  Generalised additional boundary condition for non-local dielectrics. I. Reflectivity , 1984 .

[15]  Basab B. Dasgupta,et al.  Polarizability of a small sphere including nonlocal effects , 1981 .

[16]  G. Agarwal,et al.  Electromagnetic fields in spatially dispersive media , 1974 .

[17]  A. Fetter,et al.  Electrodynamics of a layered electron gas. I. Single layer , 1973 .

[18]  R. W. Christy,et al.  Optical Constants of the Noble Metals , 1972 .

[19]  B. Feuerbacher,et al.  Optically Excited Longitudinal Plasmons in Potassium , 1971 .

[20]  I. Lindau,et al.  Experimental evidence for excitation of longitudinal plasmons by photons , 1970 .

[21]  W. Jones,et al.  Nonlocal Theory of the Optical Properties of Thin Metallic Films , 1969 .