Open Access99% efficiency measured in the -1st order of a resonant grating
Author(s) -
Nathalie Destouches,
A.V. Tishchenko,
Jean-Claude Pommier,
Stéphanie Reynaud,
Ο. Parriaux,
S. Tonchev,
Marwan Abdou Ahmed
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.003230
Subject(s) - diffraction efficiency , optics , grating , materials science , diffraction grating , diffraction , guided mode resonance , dielectric , blazed grating , wavelength , ultrasonic grating , refractive index , layer (electronics) , optoelectronics , physics , composite material
A resonant diffraction grating comprising a mirror, a dielectric layer and a high index corrugation at the layer-air interface is shown to exhibit off-Littrow the record diffraction efficiency of 99% in the -1st reflected order at 1064 nm wavelength thanks to the excitation of a leaky mode of the layer. Such high figure is obtained by a grating 5 to 10 times shallower than in current attempts to realize high efficiency all-dielectric gratings.