Influence of the tip in near-field imaging of nanoparticle plasmonic modes: Weak and strong coupling regimes

We identify weak and strong coupling regimes between a near-field probing tip and a plasmonic sample by imaging plasmon-resonant gold nanodisks with scattering-type scanning near-field optical microscopy sSNOM. By means of rigorous electrodynamical calculations based on a model system, we find that in the weak coupling regime, s-SNOM can be applied for direct mapping of plasmonic nanoantenna modes, while in the strong coupling regime, the near-field probe allows for high-precision opto-mechanical control of the antenna response.

[1]  D. Wiersma,et al.  Spectral tuning and near-field imaging of photonic crystal microcavities , 2008 .

[2]  L. Liz‐Marzán,et al.  Mapping surface plasmons on a single metallic nanoparticle , 2007 .

[3]  Emil Prodan,et al.  Plasmon Hybridization in Nanoparticle Dimers , 2004 .

[4]  Tim H. Taminiau,et al.  Optical antennas direct single-molecule emission , 2008 .

[5]  K. Kern,et al.  Direct near-field optical imaging of higher order plasmonic resonances. , 2008, Nano letters.

[6]  B. Hecht,et al.  Principles of nano-optics , 2006 .

[7]  F. G. D. Abajo,et al.  Retarded field calculation of electron energy loss in inhomogeneous dielectrics , 2002 .

[8]  Harry A. Atwater,et al.  Local detection of electromagnetic energy transport below the diffraction limit in metal nanoparticle plasmon waveguides , 2003, Nature materials.

[9]  Hongxing Xu,et al.  Spectroscopy of Single Hemoglobin Molecules by Surface Enhanced Raman Scattering , 1999 .

[10]  Garnett W. Bryant,et al.  Metal‐nanoparticle plasmonics , 2008 .

[11]  J. Aizpurua,et al.  Coherent imaging of nanoscale plasmon patterns with a carbon nanotube optical probe , 2003 .

[12]  Federico Capasso,et al.  Plasmonic laser antenna , 2006 .

[13]  N. Halas,et al.  Nano-optics from sensing to waveguiding , 2007 .

[14]  T. Ebbesen,et al.  Channel plasmon subwavelength waveguide components including interferometers and ring resonators , 2006, Nature.

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

[16]  F. G. D. Abajo,et al.  RELATIVISTIC ELECTRON ENERGY LOSS AND ELECTRON-INDUCED PHOTON EMISSION IN INHOMOGENEOUS DIELECTRICS , 1998 .

[17]  T. Klar,et al.  Biomolecular Recognition Based on Single Gold Nanoparticle Light Scattering , 2003 .

[18]  Paul Mulvaney,et al.  Drastic reduction of plasmon damping in gold nanorods. , 2002 .

[19]  Xu,et al.  Electromagnetic contributions to single-molecule sensitivity in surface-enhanced raman scattering , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[20]  F. Keilmann,et al.  Optical oscillation modes of plasmon particles observed in direct space by phase-contrast near-field microscopy , 2001 .

[21]  Maria Kafesaki,et al.  Controlling the resonance of a photonic crystal microcavity by a near-field probe. , 2005, Physical review letters.

[22]  F. Keilmann,et al.  Complex optical constants on a subwavelength scale. , 2000, Physical review letters.

[23]  S. Leone,et al.  Polarization-selective mapping of near-field intensity and phase around gold nanoparticles using apertureless near-field microscopy. , 2008, Optics express.

[24]  Eric Bourillot,et al.  Squeezing the Optical Near-Field Zone by Plasmon Coupling of Metallic Nanoparticles , 1999 .

[25]  J. Aizpurua,et al.  Substrate-enhanced infrared near-field spectroscopy. , 2008, Optics express.

[26]  Javier Aizpurua,et al.  Close encounters between two nanoshells. , 2008, Nano letters.

[27]  F. Keilmann,et al.  Near-field microscopy by elastic light scattering from a tip , 2004, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[28]  Javier Aizpurua,et al.  Plasmons in nearly touching metallic nanoparticles: singular response in the limit of touching dimers. , 2006, Optics Express.

[29]  D. Bergman,et al.  Coherent control of femtosecond energy localization in nanosystems. , 2002, Physical review letters.

[30]  Zhijun Sun,et al.  Femtosecond imaging of surface plasmon dynamics in a nanostructured silver film. , 2005, Nano letters.

[31]  L. A. Bumm,et al.  Near-field spectroscopy of surface plasmons in flat gold nanoparticles. , 2007, Optics letters.

[32]  Younan Xia,et al.  Optical near-field mapping of plasmonic nanoprisms. , 2008, Nano letters.

[33]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[34]  G. Wiederrecht.  Near-field optical imaging of noble metal nanoparticles , 2004 .

[35]  Harry A. Atwater.  The promise of plasmonics. , 2007 .

[36]  V. Subramaniam,et al.  Nano-mechanical tuning and imaging of a photonic crystal micro-cavity resonance. , 2006, Optics express.