Recombination luminescence of oxygen-deficient centers in silica

Peculiarities of photoluminescence excited by 157nm wavelength F2 excimer laser in fused and unfused silicon dioxide

“…PL in these materials is also studied under the excitation by pulses of an ArF excimer laser (193 nm wavelength) [14]. The result obtained correlates with previous PL measurements performed with a low power light sources excitation, which demonstrated the lack of excitation bands in the vicinity of 193 nm wavelength for unfused material.…”

“…1 and 2 present PL spectra of the samples under study excited by the F 2 laser. PL spectra excited by the ArF laser and absorption spectra extracted from [12,14] are depicted for comparison. Fused materials show a good correspondence of the PL spectra excited by different lasers.…”

“…In fluorine-doped sample the blue band fast component contributes smaller. [12][13][14] for UV and blue PL bands. Undoped fused material demonstrates a more intense PL in the UV band (Fig.…”

“…The result obtained correlates with previous PL measurements performed with a low power light sources excitation, which demonstrated the lack of excitation bands in the vicinity of 193 nm wavelength for unfused material. By contrast, fused sample shines brightly when exposed to the ArF laser radiation [14] as well as the other samples of high purity hydroxyl free silica glasses [15]. PL character corresponds to ODCs modified by neighbors and excited via a recombination process.…”

Luminescence of localized states in silicon dioxide glass. A short review

“…Therefore the only way of revealing of localized states' properties in silica glasses are detailed studies related to the oxygen deficiency. It was found that beside luminescence of the lone twofold coordinated silicon center [13][14][15] -the host point defect in the silica glass -all types of silica glasses manufactured by different preparation methods possess luminescence of oxygen deficient centers differing in properties relatively to the lone twofold-coordinated silicon [11,[16][17][18][19][20].…”