Optical extinction in a single layer of nanorods.
We demonstrate that almost 100% of incident photons can interact with a monolayer of scatterers in a symmetrical environment. Nearly perfect optical extinction through free-standing transparent nanorod arrays has been measured. The sharp spectral opacity window, in the form of a characteristic Fano resonance, arises from the coherent multiple scattering in the array. In addition, we show that nanorods made of absorbing material exhibit a 25-fold absorption enhancement per unit volume compared to unstructured thin film. These results open new perspectives for light management in high-Q, low volume dielectric nanostructures, with potential applications in optical systems, spectroscopy, and optomechanics.
Laboratoire de Photonique et Nanostructures (LPN-CNRS), Route de Nozay, 91460 Marcoussis, France.
Petru
P
Ghenuche
Grégory
G
Vincent
Marine
M
Laroche
Nathalie
N
Bardou
Riad
R
Haïdar
Jean-Luc
JL
Pelouard
Stéphane
S
Collin
D055590:Electromagnetic Phenomena; D008567:Membranes, Artificial; D008956:Models, Chemical; D043942:Nanotubes / Q000737:chemistry*; D017785:Photons; D012542:Scattering, Radiation; D017655:Silicon Compounds / Q000737:chemistry
D008567:Membranes, Artificial; D017655:Silicon Compounds; C032734:silicon nitride