Open AccessObstructive micro diffracting structures as an alternative to plasmonics nano slits for making efficient microlenses
Author(s) -
G. Vitrant,
Soraya Zaiba,
Benyamin Y. Vineeth,
Timothé Kouriba,
Omar Ziane,
Olivier Stéphan,
Jocelyne Bosson,
Patrice L. Baldeck
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.026542
Subject(s) - optics , plasmon , diffraction , planar , nano , surface plasmon , materials science , wavelength , ptychography , diffraction efficiency , extraordinary optical transmission , nanophotonics , refractive index , optoelectronics , surface plasmon polariton , physics , computer science , computer graphics (images) , composite material
Miniature optical components at the wavelength scale remain today a theoretically opened challenging problem of great technological interest. Appart from refractive micro-optics, plasmonics have been proposed to realize micro lenses with properly designed planar metallic nano-patterns. We show in this paper that efficient light focusing at the diffraction limit with higher transmission can be obtained with micro-structures much easier to fabricate than nano ones, such as a simple micro-slit studied here as an example. Optical properties are attributed to diffraction and a quantitative excellent agreement between experiment and theory is obtained.