Visible range lasing in dye-doped doubly periodic layered structures in dichromate gelatin emulsions

Visible range lasing in dye-doped doubly periodic layered structures in dichromate gelatin emulsions
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重铬酸盐明胶乳液中染料掺杂双周期层状结构的可见光范围激光

DOI:
10.1088/2040-8978/14/1/015104
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发表时间:
2012
期刊:
Journal of Optics A-Pure and Applied Optics
影响因子:
--
通讯作者:
C T Chan
C T Chan
中科院分区:
其他
文献类型:
--
作者:
Wang Xia;Mang Hin Kok;Weixin Lu;Jeffrey Chi Wai Lee;Wing Yim Tam;George K L Wong;C T Chan

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利用双曝光全息干涉法在重铬酸盐明胶乳剂中制备了可见光范围内具有多个带隙的染料掺杂双周期层状结构。更重要的是,在染料掺杂的双周期明胶样品中观察到了比单周期分层结构更高效率和更低阈值的光泵激光。这种有效的激光可以通过两个单周期层状结构的重叠带隙处的态密度的增强来解释。
We have fabricated dye-doped doubly periodic layered structures exhibiting multiple bandgaps in the visible range in dichromate gelatin emulsions by a double-exposure holographic interference method. More importantly, optically pumped lasing with higher efficiency and lower threshold compared to that of singly periodic layered structures was observed in the dye-doped doubly periodic gelatin samples. This efficient lasing could be explained by the enhancement of the density of states at the overlapping bandgaps of two singly periodic layered structures.
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