Microlasers have experienced tremendous development in the past decade and become an
essential part in laser evolution, as miniature lasers provide strong optical confinement and …

Whispering gallery mode (WGM) microresonators, thanks to their unique properties, have
allowed researchers to achieve important results in both fundamental research and …

Confinement of light into small volumes has become an essential requirement for photonic
devices; examples of this trend are provided by optical fibers, integrated optical circuits …

Er 3+-doped glass based on TiO 2–GeO 2–BaO–Ga 2 O 3 has been examined for mid-IR
luminescence applications. Mid-IR luminescence corresponding to the 4 I 11/2→ 4 I 13/2 …

This paper reports on the news about refractive index measurements and spectroscopic
features of thin films, which can be applied as optical planar waveguides, focusing on their …

In this review, we present a short overview of the development of sol–gel glasses for
application in the field of photonics, with a focus on some of the most interesting results …

HfO 2 films doped with Nd and Si atoms were produced by RF magnetron sputtering in
argon plasma atmosphere. The effect of annealing treatment on the morphology, crystal …

This work combines photoluminescence methods, Raman spectroscopy, and X-ray
diffraction (XRD) to expand the knowledge of the effects of pair rare earth ions doping on the …

This paper demonstrates the functionality of radio-frequency magnetron sputtering for the
fabrication of undoped and Er-doped Si-rich-HfO 2 films with specific structural and …

We report on the sol–gel fabrication, using a dip-coating technique, of low-loss Eu-doped
70SiO 2–$(30-x) $ HfO 2–xZnO (x= 2, 5, 7 and 10 mol%) ternary glass-ceramic planar …