Authors:
Erika Koussi
;
Hugo Bruhier
;
Isabelle Verrier
;
Colette Veillas
;
Thomas Kampfe
;
Nicolas Crespo-Monteiro
;
Damien Jamon
;
Olivier Parriaux
and
Yves Jourlin
Affiliation:
Univ. Lyon, UJM Saint-Etienne, CNRS, Institut d’Optique Graduate School, Lab. Hubert Curien UMR 5516, Saint-Etienne and France
Keyword(s):
Cylindrical Diffraction Gratings, Sol-gel, Resonant Gratings, Conical Mirror.
Related
Ontology
Subjects/Areas/Topics:
Photodetectors, Sensors and Imaging
;
Photonic and Optoelectronic Materials and Devices
;
Photonics
;
Photonics, Optics and Laser Technology
;
Ultrafast Electronics, Photonics and Optoelectronics
Abstract:
This study presents a miniaturized silica tube, coated with a dielectric TiO2 sol-gel layer and a complementary positive photo resist periodically patterned in its inner walls. A cylindrical subwavelength diffraction grating is printed, after being light exposed by a specially designed radial phase mask that projects solely the ±1 diffractive orders transversally to the central tube axis. A first demonstration of the excitation of the mode in the microstructure is achieved by the holistic phenomenon and through a centred reflective conical mirror able to transpose plane to cylindrical waves and conversely. A fine spectral resonance in reflection in the near-infrared range is measured and subsequently analyzed by optical spectroscopic means. The design, fabrication, characterization of this structure are described as well as the first results of experimental resonant TE/TM reflection pick spectrum.