Optical Absorption in Erbium Doped Phosphate Glass Embedded with Cobalt Nanoparticles
A series of Er3+ doped phosphate glass embedded with CoO nanoparticles (NPs) were synthesized from high purity raw materials by melt quenching and the influence of CoO NPs on the optical absorption were investigated. The glass has been characterized by means of TEM and UV-Vis Spectroscopy. Investigation on TEM image displays the existence of NPs where its distribution is Gaussian with the average size of 5.18 nm. Five absorbtion bands of erbium were evidenced in the UV-Vis measurement. For UV-Vis absorption peaks, the optical band gap energy, Eopt has been estimated in the range of 3.22 3.89 eV, increasing with the increasing of CoO content. Meanwhile, the urbach energy is found to be in the range of 0.98 0.74 eV decreasing with the CoO content. All the results will be discussed with respect to CoO content.
Jedol Dayou, Azhan Hashim, Walter Charles Primus, Fuei Pien Chee, Mohamad Deraman and Roslan Abd-Shukor
N. A. M. Adnan et al., "Optical Absorption in Erbium Doped Phosphate Glass Embedded with Cobalt Nanoparticles", Advanced Materials Research, Vol. 1107, pp. 409-414, 2015