99% efficiency measured in the -1st order of a resonant grating

Nathalie Destouches (1) , A.V. Tishchenko (1) , J.C. Pommier (1) , S. Reynaud (1) , O. Parriaux (1) , S. Tonchev (1) , M. Abdou Ahmed (1)

1 LHC - Laboratoire Hubert Curien [Saint Etienne]

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 -1 st 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.

Keywords: Gratings; Guided waves; Single-mode lasers; Microstructure fabrication; Thin films; optical properties; Leaky mode

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Nathalie Destouches, A.V. Tishchenko, J.C. Pommier, S. Reynaud, O. Parriaux, et al.. 99% efficiency measured in the -1st order of a resonant grating. Optics Express, 2005, 13, pp.3230-3235. ⟨ujm-00122907⟩