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Plasmonics and nanophotonics IV

16:40 Invited talk : Plasmonics/metamaterials and crystal growth at the crossroads

D. A. Pawlak (1),K. Sadecka (1),P. Osewski (1),M. Gajc (1),K. Korzeb (1),A. Klos (1),E. Petronijevic (2),A. Belardini (2),G. Leahu (2),C. Sibilia (2)

(1)Institute of Electronic Materials Technology - ITME (Poland) , (2)University of Warsaw (Poland)

We report on developments in fabricating nano and micro-structured volumetric plasmonic materials and metamaterials utilizing crystal growth techniques as the micro-pulling down method. Materials developed by directional solidification of eutectic composites and directional solidification of dielectrics directly doped with functional nanoparticles.
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17:00 : Plasmon Assisted Thermionic Current Injection in Metal-Insulator-Metal Junctions

Matthias Hensen (1),Dominik Differt (1),Felix Becker (1),Detelf Diesing (2),Walter Pfeiffer (1)

(1)Bielefeld University (Germany) , (2)Universitat Duisburg-Essen (Germany)

Gold nanoparticles deposited on a metal-insulator-metal junction act as optical nanoantennas and locally enhance the absorption of radiation. As a consequence the electron gas in the top electrode is heated and thermionic emission dominates the carrier injection upon excitation with ultrashort laser pulses. The injection current is sufficiently large to allow the detection of single nanoparticles. The optically driven nonlinear carrier injection mechanism demonstrated here opens new perspectives for nanoantenna based photodetectors and ultrafast switching.
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17:15 : Plasmo-Photonic Metasurfaces Manipulating Electronic Processes in Fluorescent Molecules

Masanobu Iwanaga, Bongseok Choi, Hideki Miyazaki, Yoshimasa Sugimoto, Akihiro Ohtake, Kazuaki Sakoda

National Institute for Materials Science (Japan)

Plasmo-photonic metasurfaces, which have been very recently introduced, are applied for fluorescence (FL) enhancement experiment. Optimization of the structur and the gap between the outmost interface and FL molecules has enabled us to reach significant FL enhancement factor over 5500 fold, strongly suggesting that desired control of electronic transitions in the FL molecules is realized.
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17:30 : Large-area metasurface antireflection coating enabled by randomly dispersed silver nanodiscs

Hideki Yasuda, Ryo Matsuno, Takeharu Tani, Masayuki Naya

Fujifilm Corp. (Japan)

We propose a metasurface anti-reflection coating for visible light using randomly dispersed silver nanodiscs. The effective refractive index of 10nm-thick monolayer of silver nanodiscs is about 0.5 for visible light, which enable strong suppression of reflection from substrate. This structure is easy to fabricate using conventional wet-coating methods and we report successful fabrication of proposed structure in a large area.
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17:45 : Study of plasmonic oscillations in composite structures through surface integral equation method

Dimitrios Ch. Tzarouchis, Pasi Yla-Oijala, Ari Sihvola

AALTO University (Finland)

Tailoring the optical response of geometrically complex metal structures and clusters is a highly demanding procedure. In the present work, we demonstrate the usage of the surface integral equation method, for the evaluation of the near fields on metallic scatterers, at the optical regime. In that way, some important physical insights occur, enabling the deduction of useful design guidelines.
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