Detail publikace

Spatially resolved electron energy loss spectroscopy of crescent-shaped plasmonic antennas

KŘÁPEK, V. KOH, A. BŘÍNEK, L. HRTOŇ, M. TOMANEC, O. KALOUSEK, R. MAIER, S. ŠIKOLA, T.

Originální název

Spatially resolved electron energy loss spectroscopy of crescent-shaped plasmonic antennas

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

We present a study of the optical properties of gold crescent-shaped antennas by means of electron energy loss spectroscopy. These structures exhibit particularly large field enhancement near their sharp features, support two non-degenerate dipolar (i.e., optically active) localised surface plasmon resonances, and are widely tunable by a choice of their shape and dimensions. Depending on the volume and shape, we resolved up to four plasmon resonances in metallic structures under study in the energy range of 0.8 - 2.4 eV: two dipolar and quadrupolar mode and a multimodal assembly. The boundary-element-method calculations reproduced the observed spectra and helped to identify the character of the resonances. The two lowest modes are of particular importance owing to their dipolar nature. Remarkably, they are both concentrated near the tips of the crescent, spectrally well resolved and their energies can be tuned between 0.8 - 1.5 eV and 1.2 - 2.0 eV, respectively. As the lower spectral range covers the telecommunication wavelengths 1.30 and 1.55 micro m, we envisage the possible use of such nanostructures in infrared communication technology.

Klíčová slova

Nanomaterials; Surface plasmons; Plasmonics; Subwavelength structures, nanostructures

Autoři

KŘÁPEK, V.; KOH, A.; BŘÍNEK, L.; HRTOŇ, M.; TOMANEC, O.; KALOUSEK, R.; MAIER, S.; ŠIKOLA, T.

Rok RIV

2015

Vydáno

27. 4. 2015

ISSN

1094-4087

Periodikum

OPTICS EXPRESS

Ročník

23

Číslo

9

Stát

Spojené státy americké

Strany od

11855

Strany do

11867

Strany počet

13

BibTex

@article{BUT114464,
  author="Vlastimil {Křápek} and Ai Leen {Koh} and Lukáš {Břínek} and Martin {Hrtoň} and Ondřej {Tomanec} and Radek {Kalousek} and Stefan A. {Maier} and Tomáš {Šikola}",
  title="Spatially resolved electron energy loss spectroscopy of crescent-shaped plasmonic antennas",
  journal="OPTICS EXPRESS",
  year="2015",
  volume="23",
  number="9",
  pages="11855--11867",
  doi="10.1364/OE.23.011855",
  issn="1094-4087"
}