Collaborations

(:cellnr align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect.png

(:cellnr align='center':) %width=250px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect.png

(:cellnr align='center':) %width=200px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect.png

(:cellnr align='center':) %width=175px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/r10_d5_c75.png

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(:cellnr align='center':) %width=175px% http://www-sop.inria.fr/nachos/pics/collabs/w_blanc/nano_fiber.png

!! Institut Pascal, Université Blaise Pascal\\\

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%center% Meshes of rounded nanocubes  with rounding radii ranging from 2 to 10 nm. Red cells correspond to the cube. The latter lies on the dielectric spacer (gray cells) and  the metallic plate (green). Blue cells represent the air surrounding the device.

%center% Amplitude of  the discrete Fourier transform  of the magnetic field  for different  nanocube configurations.  All field  maps are scaled identically for better comparison. The obtained field is more intense  for  configurations  that  yield  high  Q'_cube_' values.

%center% Time-domain  snapshot  of  E'_y_'  component  for  ideal  and realistic  1D dielectric  reflectarrays.  Solution  is obtained  in established regime at t = 0.1 ps. Fields are scaled to [-1,1].

(:cellnr align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_ideal_f1.png
(:cell  align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect_f1.png

(:cellnr align='center':) %width=550px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_ideal_f1.png
(:cell  align='center':) %width=550px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect_f1.png

(:cellnr align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_sharp.png

(:cellnr align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect.png

(:cellnr align='center':) %width=250px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_sharp.png
(:cell  align='center':) %width=250px% http://www-sop.inria.fr/nachos/pics/collabs/m_klemm/bigdiel_imperfect.png

(:cell   align='center':) Realistic reflectarray

The propagation  of light in  a slit between  metals is known  to give rise to guided  modes. When the slit is of  nanometric size, plasmonic effects must be taken into account,  since most of the mode propagates inside the metal. Indeed, light experiences an important slowing-down in  the  slit, the  resulting  mode  being called ''gap-plasmon''. Hence, a metallic structure presenting a  manometric slit can act as a light trap, i.e. light will accumulate  in a reduced space and lead to very intense,  localized fields. Recently, the  chemical production of random arrangements of nanocubes on gold  films at low cost was proved possible  by  Antoine  Moreau  and  colleagues  at  Institut  Pascal. Nanotubes are separated from the gold substrate by a dielectric spacer of variable thickness, thus forming a narrow slit under the cube. When excited from above, this configuration  is able to support gap-plasmon modes which,  once trapped, will  keep bouncing back and  forth inside the cavity.  At visible frequencies, the lossy behavior of metals will cause the progressive absorption of the trapped electromagnetic field, turning  the  metallic  nanocubes  into  efficient  absorbers. The frequencies at which this absorption  occurs can be tuned by adjusting the dimensions of the nanocube  and the spacer.  In collaboration with Antoine  Moreau, we  propose to  study numerically  the impact  of the geometric  parameters of  the problem  on  the behaviour  of a  single nanocube placed  over a metallic slab. The  behavior  of  single  nanocubes  on  metallic  plates  has  been simulated, for lateral sizes ''c'' ranging  from 50 to 80 nm, and spacer thicknesses ''d'' from 3 to  22 nm.  The absorption  efficiency in the  cube Q'_cube_'  at the  resonance frequency  is retrieved from      the    results of each computation.

(:cellnr align='center':) %width=300px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/r2_d5_c75.png
(:cell  align='center':) %width=300px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/r10_d5_c75.png

(:cellnr align='center':) %width=300px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/nanocube_d12nm_c70nm_H_visu2.png
(:cell  align='center':) %width=300px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/nanocube_d18nm_c60nm_H_visu2.png

(:cellnr align='center':) %width=350px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/r2_d5_c75.png
(:cell  align='center':) %width=345px% http://www-sop.inria.fr/nachos/pics/collabs/a_moreau/r10_d5_c75.png

!! Institut Pascal, Université Blaise Pascal\\

!! Gap-plasmon confinement with gold nanocubes\\\

!! Gap-plasmon confinement with gold nanocubes\\

!!! %newwin% [[http://cloud.ip.univ-bpclermont.fr/~moreau/index_en.html | Antoine Moreau]]\\

!!! Institut Pascal, Université Blaise Pascal\\

!!! Gap-plasmon confinement with gold nanocubes\\

%newwin% [[http://cloud.ip.univ-bpclermont.fr/~moreau/index_en.html | Antoine Moreau]]\\

Institut Pascal, Université Blaise Pascal\\\

!!! %newwin% [[http://cloud.ip.univ-bpclermont.fr/~moreau/index_en.html | Antoine Moreau]]\\
!!! Institut Pascal, Université Blaise Pascal\\\

%newwin% [[http://cloud.ip.univ-bpclermont.fr/~moreau/index_en.html | Antoine Moreau]]\\
Institut Pascal, Université Blaise Pascal\\\
Gap-plasmon confinement with gold nanocubes\\

Institut Pascal, Université Blaise Pascal\\

[-The propagation  of light in  a slit between  metals is known  to give rise to guided  modes. When the slit is of  nanometric size, plasmonic effects must be taken into account,  since most of the mode propagates inside the metal. Indeed, light experiences an important slowing-down in  the  slit, the  resulting  mode  being called ''gap-plasmon''. Hence, a metallic structure presenting a  manometric slit can act as a light trap, i.e. light will accumulate  in a reduced space and lead to very intense,  localized fields. Recently, the  chemical production of random arrangements of nanocubes on gold  films at low cost was proved possible  by  Antoine  Moreau  and  colleagues  at  Institut  Pascal. Nanotubes are separated from the gold substrate by a dielectric spacer of variable thickness, thus forming a narrow slit under the cube. When excited from above, this configuration  is able to support gap-plasmon modes which,  once trapped, will  keep bouncing back and  forth inside the cavity.  At visible frequencies, the lossy behavior of metals will cause the progressive absorption of the trapped electromagnetic field, turning  the  metallic  nanocubes  into  efficient  absorbers. The frequencies at which this absorption  occurs can be tuned by adjusting the dimensions of the nanocube  and the spacer.  In collaboration with Antoine  Moreau, we  propose to  study numerically  the impact  of the geometric  parameters of  the problem  on  the behaviour  of a  single nanocube placed  over a metallic slab. The  behavior  of  single  nanocubes  on  metallic  plates  has  been simulated, for lateral sizes ''c'' ranging  from 50 to 80 nm, and spacer thicknesses ''d'' from 3 to  22 nm.  The absorption  efficiency in the  cube Q'_cube_'  at the  resonance frequency  is retrieved from      the      results of each computation.-]

[-The propagation  of light in  a slit between  metals is known  to give rise to guided  modes. When the slit is of  nanometric size, plasmonic effects must be taken into account,  since most of the mode propagates inside the metal. Indeed,  light experiences an important slowing-down in  the  slit, the  resulting  mode  being called ''gap-plasmon''. Hence, a metallic structure presenting a  nanometric slit can act as a light trap, i.e. light will accumulate  in a reduced space and lead to very intense,  localized fields. Recently, the  chemical production of random arrangements of nanocubes on gold  films at low cost was proved possible  by  Antoine  Moreau  and  colleagues  at  Institut  Pascal. Nanocubes are separated from the gold substrate by a dielectric spacer of variable thickness, thus forming a narrow slit under the cube. When excited from above, this configuration  is able to support gap-plasmon modes which,  once trapped, will  keep bouncing back and  forth inside the cavity.  At visible frequencies, the lossy behavior of metals will cause the progressive absorption of the trapped electromagnetic field, turning  the  metallic  nanocubes  into  efficient  absorbers.   The frequencies at which this absorption  occurs can be tuned by adjusting the dimensions of the nanocube  and the spacer.  In collaboration with
Antoine  Moreau, we  propose to  study numerically  the impact  of the geometric  parameters of  the problem  on  the behaviour  of a  single
nanocube placed  over a metallic slab. The  behavior  of  single  nanocubes  on  metallic  plates  has  been simulated, for lateral sizes ''c'' ranging  from 50 to 80 nm, and spacer thicknesses ''d'' from 3 to  22 nm.  The absorption  efficiency in the  cube Q'_cube_'  at the  resonance frequency  is retrieved from      the      results of each computation.-]

Gap-plasmon confinement with gold nanocubes\\\

The propagation  of light in  a slit between  metals is known  to give rise to guided  modes. When the slit is of  nanometric size, plasmonic effects must be taken into account,  since most of the mode propagates inside the metal. Indeed,  light experiences an important slowing-down in  the  slit, the  resulting  mode  being called ''gap-plasmon''. Hence, a metallic structure presenting a  nanometric slit can act as a light trap, i.e. light will accumulate  in a reduced space and lead to very intense,  localized fields. Recently, the  chemical production of random arrangements of nanocubes on gold  films at low cost was proved possible  by  Antoine  Moreau  and  colleagues  at  Institut  Pascal. Nanocubes are separated from the gold substrate by a dielectric spacer of variable thickness, thus forming a narrow slit under the cube. When excited from above, this configuration  is able to support gap-plasmon modes which,  once trapped, will  keep bouncing back and  forth inside the cavity.  At visible frequencies, the lossy behavior of metals will cause the progressive absorption of the trapped electromagnetic field, turning  the  metallic  nanocubes  into  efficient  absorbers.  The frequencies at which this absorption  occurs can be tuned by adjusting the dimensions of the nanocube  and the spacer.  In collaboration with

nanocube placed  over a metallic slab. The  behavior  of  single  nanocubes  on  metallic  plates  has  been simulated, for lateral sizes ''c'' ranging  from 50 to 80 nm, and spacer thicknesses ''d'' from 3 to  22 nm.  The absorption  efficiency in the  cube Q'_cube_'  at the  resonance frequency  is retrieved from      the      results of each computation.

%newwin% [[http://cloud.ip.univ-bpclermont.fr/~moreau | Antoine Moreau]]\\

%newwin% [[http://elma.univ-bpclermont.fr/moreau | Antoine Moreau]]\\
[-Institut Pascal, Université Blaise Pascal-]\\

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