We report on optical properties and prospect applications on rare-earth doped oxyfluoride precursor glass and ensuing nano-glass-ceramics. We find out the spectral optical gain of the nano-glass-ceramics and show that its flatness and breadth are advantageous as compared to contemporary used erbium doped optical amplifiers. We present the possibility of flat gain cross-section erbium doped waveguide amplifiers as short 'chip', all-optical, devices capable of dense wavelength division multiplexing, including the potential for direct writing of these devices inside bulk glasses for three-dimensional photonic integration. We carried out a comparative study of the up-conversion luminescence in Er3+-doped and Yb3+-Er3+-Tm3+ co-doped samples, which indicates that these materials can be used as green/red tuneable up-conversion phosphors and white light simulation respectively. Observed changes in the spectra of the up-conversion luminescence provide a tool for tuning the colour opening the way for producing 3-dimensional optical recording.
The role of the aging in the photoluminescence (PL) of stain etched porous silicon (PS) layers and its behaviour at
different temperatures have been studied. The photoluminescence has been measured at different temperatures showing
the influence of the phonons in the intensity of the emissions and the lifetimes. Two contributions to the
photoluminescence spectra have been found: one due to quantum confinement effects and the other one due to the
presence of non-bridging oxygen hole centre defects. There is no evidence of energetic shifts on the maximum at
different temperatures.
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