Experimental demonstration of a narrowband, angular tolerant, polarization independent, doubly periodic resonant grating filter.
Resonant grating filters are promising components for free-space narrowband filtering. Unfortunately, due to their weak angular tolerance, their performances are strongly deteriorated when they are illuminated with a standard collimated beam. Yet this problem can be overcome by resorting to a complex periodic pattern known as the doubly periodic grating [Lemarchand et al., Opt. Lett.23, 1149 (1998)]. We report what we believe to be the first experimental fabrication and characterization of a bidimensional doubly periodic grating filter. We obtained a 0.5 nm bandpass polarization independent reflection filter for telecom wavelengths (1520-1570 nm) that presents a transmittivity minimum of 18% with a standard incident collimated beam.
Institut Fresnel, CNRS UMR6133, Faculté de Saint Jérome (case 162), 13397 Marseille Cedex, France. anne-laure.fehrembach@fresnel.fr
Anne-Laure
AL
Fehrembach
Anne
A
Talneau
Olga
O
Boyko
Fabien
F
Lemarchand
Anne
A
Sentenac