Integrated plasmonic double bowtie / ring grating
structure for enhanced electric field confinement

• Authors: N. Rahbany , W. Geng , S. Blaize , R. Salas-Montiel , R. Bachelot , C. Couteau
• Languages of publication: EN

Abstracts

EN

Metallic nanoparticles and nanoantennas have
been extensively studied due to their capability to increase
electromagnetic field confinement which is essential in
numerous applications ranging from optoelectronics
to telecommunication and sensing devices. We show
that a double bowtie nanoantenna has a higher electric
field confinement in its gap compared to a single bowtie
nanoantenna, which is expected to give better fluorescence
enhancement of a single emitter placed in the gap. We show
that the electric field intensity can be further increased by
placing the double bowtie inside a ring grating structure
where the excitation of surface plasmon-polaritons (SPPs)
is achieved. We perform FDTD simulations to characterise
the double bowtie nanoantenna and study the effect of
its dimensions on the electric field enhancement in the
gap. Our proposed integrated structure with gratings is
shown to increase the electric field by a factor of 77 due
to a double cavity effect. Next steps would be to study the
fluorescence enhancement of emitters placed inside our
double bowtie / ring grating nanocavity to see if the strong
coupling regime can be attained.

Keywords

EN

double bowtie nanoantenna; ring grating; plasmonic; field enhancement; plasmon-emitter coupling

• Publisher: De Gruyter Open
• Journal: Nanospectroscopy
• Year: 2014
• Volume: 1
• Issue: 1

Dates

accepted

20 - 5 - 2015

received

22 - 6 - 2014

online

28 - 8 - 2015

Contributors

author

N. Rahbany

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

author

W. Geng

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

author

S. Blaize

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

author

R. Salas-Montiel

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

author

R. Bachelot

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

author

C. Couteau

• Laboratory of Nanotechnology, Instrumentation and Optics, Charles
  Delaunay Institute - UMR CNRS 6281, University of Technology of Troyes

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Identifiers

DOI

10.1515/nansp-2015-0005