Improvement of fluorescence intensity of nitrogen vacancy centers in self-formed diamond microstructures
Improvement of fluorescence intensity of nitrogen vacancy centers in self-formed diamond microstructures
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DOI：
10.1063/1.4933103
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发表时间：
2015-10
影响因子：
4
通讯作者：
S. Furuyama;K. Tahara;T. Iwasaki;M. Shimizu;J. Yaita;M. Kondo;T. Kodera;M. Hatano
中科院分区：
文献类型：
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作者：
S. Furuyama;K. Tahara;T. Iwasaki;M. Shimizu;J. Yaita;M. Kondo;T. Kodera;M. Hatano
为了提高从氮空位中心收集光子的数量，我们提出了底部带有金属镜的伞状金刚石微结构。底部的金属镜与伞形金刚石微结构自对准，伞形金刚石微结构通过在金属掩模上创建的孔选择性地生长。通过时域有限差分模拟，我们发现伞状微结构具有类似于固体浸没透镜的效果，比块状或柱状微结构更能有效地收集光子。实验表明荧光强度提高了3 - 5倍。
We present umbrella-shaped diamond microstructures with metal mirrors at the bottom in order to improve the amount of collected photons from nitrogen vacancy centers. The metal mirrors at the bottom are self-aligned to the umbrella-shaped diamond microstructures which are selectively grown through holes created on a metal mask. By the finite-difference time-domain simulations, we found that the umbrella-shaped microstructures, which have an effect similar to solid immersion lens, could collect photons more efficiently than bulk or pillar-shaped microstructures. Improvement of the fluorescence intensity by factors of from 3 to 5 is shown experimentally.