Spatially resolved photonic transfer through mesoscopic heterowires.
We report spatially resolved observations of light wave propagation along high refraction index dielectric heterowires lying on a transparent substrate. The heterowires are made of linear chains of closely packed mesoscopic particles. The optical excitation of these heterowires is performed through channel waveguides featuring submicrometer transverse cross sections. Both numerical simulations and near-field optical images, recorded with a photon scanning tunneling microscope, agree to show that, at visible frequencies, tuning the periodicity of the heterowires controls the propagation length within a range of several micrometers.
Quidant
R
R
Laboratoire de Physique de l'Université de Bourgogne, Optique Submicronique, Boîte Postale 47870, F-21078 Dijon, France.
Weeber
J-C
JC
Dereux
A
A
Peyrade
D
D
Girard
Ch
Ch
Chen
Y
Y