掺铒石英玻璃微球的红外泵浦 537nm 相干辐射。
Coherent emission at 537 nm from IR-pumped erbium-doped silica microspheres.
出版信息
Opt Lett. 2014 Feb 15;39(4):907-9. doi: 10.1364/OL.39.000907.
Low pump threshold upconversion narrowband emission at 537 nm in a simple system of erbium-doped silica microsphere at the tip of a fiber is reported. The emission comes out radially (not from whispering gallery modes) and is strongly enhanced by a thin metal coating, in particular with platinum. This enhancement seems to be related to the coupling with surface plasmons. The emission wavelength does not correspond to any energy level differences of erbium in silica, and is the same that was reported earlier in a coated fiber.
报道了一种简单的掺铒硅微球光纤尖端系统，其中存在泵浦阈值低的上转换窄带发射，发射波长在 537nm。发射是沿径向（而非 whispering gallery 模）出射的，并且在薄金属涂层（尤其是铂）的作用下得到了强烈增强。这种增强似乎与表面等离激元的耦合有关。发射波长与硅中铒的任何能级差都不对应，与之前在涂覆光纤中报道的波长相同。
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