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首页> 外文期刊>Optical Materials >Laser-induced, Er~(3+) trace-sensitized red-to-blue photon-avalanche up-conversion in Tm~(3+): KY_3F_(10)
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Laser-induced, Er~(3+) trace-sensitized red-to-blue photon-avalanche up-conversion in Tm~(3+): KY_3F_(10)

机译:Tm〜(3+)中激光诱导的Er〜(3+)痕量敏感的红蓝光子雪崩上转换:KY_3F_(10)

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摘要

We report here the first results of a spectroscopic study of anti-Stokes emissions from a Tm~(3+)-doped KY_3F_(10) crystal demonstrating the sensitization effect of Er~(3+) ions, present as trace impurities, on the ESA (~3F_4 → ~1G_4) lines of Tm~(3+). We have also detected Ho~(3+) traces in Tm~(3+): KY)3F(10). Contrary to the Er~(3+) ion, the Ho~(3+) ion does not increase the possibilities of resonant transfer with the Tm~(3+) ion. The Tm~(3+) → Ho~(3+) → Tm~(3+) transfers are much less probable than the Tm~(3+) → Er~(3+) → Tm~(3+) transfers. The majority of the Tm~(3+) ions excited by sensitized photon-avalanche absorption are exclusively located in the immediate neighbourhood of Er~(3+) ions. Red-to-green up-conversion mechanism is, for Er~(3+) either a two-step absorption process or a photon-avalanche absorption process, depending on whether the excitation wavelength is tuned on the ~4I_(13/2) → ~4F_(5/2) or ~3F_4 → ~1G_4 transitions.
机译:我们在这里报告从Tm〜(3+)掺杂的KY_3F_(10)晶体进行的反斯托克斯发射光谱研究的第一个结果,该结果证明了Er〜(3+)离子作为痕量杂质存在的增感作用。 Tm〜(3+)的ESA(〜3F_4→〜1G_4)行。我们还检测到Tm〜(3+)中的Ho〜(3+)痕迹:KY)3F(10)。与Er〜(3+)离子相反,Ho〜(3+)离子不会增加与Tm〜(3+)离子共振转移的可能性。 Tm〜(3+)→Ho〜(3+)→Tm〜(3+)转移的可能性远小于Tm〜(3+)→Er〜(3+)→Tm〜(3+)转移。敏化光子-雪崩吸收激发的大多数Tm〜(3+)离子仅位于Er〜(3+)离子的紧邻区域。对于Er〜(3+),红色到绿色的上转换机制是两步吸收过程或光子雪崩吸收过程,具体取决于激发波长是否在〜4I_(13/2)上调谐→〜4F_(5/2)或〜3F_4→〜1G_4转换。

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