Spectroscopic characterization of erbium doped glass ceramic

Mesoporous TiO2 encapsulating a visible-light responsive upconversion agent for enhanced sonocatalytic degradation of bisphenol-A

“…When the samples were excited with a 522 nm laser, the UC signals were clearly shown at the wavelengths of 339, 363, 394, 403, and 423 nm, which can be assigned to 2 P 3/2 / 4 I 15/2 , 2 K 15/2 / 4 I 15/2 , 4 G 11/2 / 4 I 15/2 , 2 H 9/2 / 4 I 15/2 , and 4 H 3/2 / 4 I 15/2 transitions of Er 3+ ions, respectively. 26,27 The UC could be triggered by the excited state absorption (ESA) mechanism which refers to that Er 3+ in the excitation state can still absorb photon(s) to transit to higher energy levels. Aerwards, the UC luminescence would be generated when the high-energy leveled Er 3+ ion relaxes to the Table 1 Physicochemical properties of the resultant core-shell nanospheres a Sample name ground state (Fig.…”

Feature issue introduction: optical ceramics

“…Furthermore, an energy transfer process from Eu 3+ ions at site A to site B at low temperature was also discussed. Kamma et al [11] describe a germanotellurite based glass with 2.4% ErF 3 made by melt quenching. The Judd-Ofelt intensity parameters were estimated, and the radiative transition probabilities and lifetimes were also calculated.…”

Integrated cavity opto-electromechanics: electrical tuning and control of optomechanical systems

“…For the rest of this chapter, we will be focusing on the rare-earth element erbium as the active medium for the optomechanical system. Erbium is an ideal candidate for our application due to its energy level structure, which causes laser emission in the telecom wavelength band, and ban be pumped either at telecom frequencies or 980 nm [291,[393][394][395]. Strong optical sources are commercially available for both pumping ranges.…”