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Page 20
Nano Research & Applications
ISSN 2471-9838
September 11-12, 2017 Amsterdam, Netherlands
20 th International Conference on
Advanced Nanotechnology
Advanced Nano 2017
Light emission based on electrically-fed nanogap
optical antennas
Gaps formed between metal surfaces control the
coupling of localized plasmons, thus allowing gap-
tuning targeted to exploit the enhanced optical fields for
different applications. Classical electrodynamics fails
to describe this coupling across sub-nm gaps, where
quantum effects become important owing to non-local
screening and spill-out of electrons. The advantages of
narrow gap antennas have mostly been demonstrated
for processes like SERS that are excited optically,
but promising new phenomena appear when such
antennas are fed by electric generators. However,
the extreme difficulty of engineering and probing an
electrically driven optical nanogap antenna has limited
experimental investigations of physical concepts at
stake in these conditions. The feasibility of structuring
electron-fed antennas as nano-light sources has been
recently demonstrated; however, this configuration
remains very limited, too much power was lost as heat
when operating the optical antenna, and the antenna
operation time was limited by the structure lifetime to
sustain a bias voltage for a few hours. The innovative
structure that we suggest here will cope with all these
limitations: ALD dielectric materials substitute the air gap
to improve the antenna stability; a quantum efficiency of
10-1 is targeted owing to a significantly efficient antenna
(2 orders of magnitude higher field enhancement). The
resulting source will operate at room temperature and
have a tunable spectral response (ranging from visible
frequencies to THz regime) defined by the antenna
geometry and the applied bias. Also, this source will be
compact, Si-compatible, and will not request specific
emitting materials (e.g. III-V semi-conductors) to
operate.
Biography
Claire Deeb has completed her PhD from University of Technology of Troyes,
France and Post-doctoral research from Argonne National Laboratory, USA and
Northwestern University, USA. She is currently a Research Scientist at C2N -
CNRS where she conducts research in the field of optics, active plasmonics, and
nano-photonics. She is collaborating with leading groups at UIUC (IL, USA) and
LMU-Munich and has led many international projects. She has given 11 invited
talks and has published over 13 papers and one book chapter. Additionally, she
has received two PhD awards and has been serving as an Editorial Board Member
of PNN.
Claire Deeb
Université Paris-Saclay, France
Claire Deeb, Nano Res Appl 2017, 3:3
DOI: 10.21767/2471-9838-C1-001