Experimental investigation on the oscillation of very-small-aperture lasers with different depth grooves on their front facets

Experimental investigation on the oscillation of very-small-aperture lasers with different depth grooves on their front facets
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前端面不同深度凹槽甚小孔径激光器振荡实验研究

DOI:
10.1088/1464-4258/9/11/005
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发表时间:
2007-09
期刊:
Journal of Optics A-Pure and Applied Optics
影响因子:
--
通讯作者:
Tian, Qian
Tian, Qian
中科院分区:
其他
文献类型:
--
作者:
Wang, Jia;Xia, Wei;Xu, Xiangang;Gai, Hongfeng;Tian, Qian

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相似文献

表面波纹通常用于通过激发表面等离子体来提高极小孔径激光器(VSAL)的输出功率。一些实验结果表明,一个VSAL不能被激光,如果表面波纹制造,而一些实验结果表明,它可以被激光。为了研究振荡条件,我们制作了具有有限阵列凹槽的VSAL。通过控制聚焦离子束刻蚀时间,制备出不同深度的沟槽。实验结果表明,随着凹槽加深,VSAL的阈值电流增加。同时,斜效率降低,激光线宽增加。这些实验结果背后的物理机制进行了讨论。实验结果表明,存在一个临界槽深。为了获得激光振荡和表面等离子体激元增强效应,凹槽应该比该临界值浅。当VSAL被适当激发时,最终获得2.4的增强因子。这些实验结果对VSAL的设计和优化具有一定的指导意义。
Surface corrugations are commonly used to increase the output power from a very-small-aperture laser (VSAL) by exciting surface plasmons. Some experimental results indicate that a VSAL cannot be lased if surface corrugations are fabricated, whereas some experimental results indicate that it can be lased. In order to investigate the oscillation condition, we fabricated VSALs with a finite array of grooves. Different depth grooves are fabricated by controlling the focused ion-beam etching time. The experimental results demonstrate that the threshold current of a VSAL increases when the grooves are deepened. At the same time, the slope efficiency decreases, and the laser linewidth increases. The physical mechanism behind these experimental results is discussed. The experimental results imply that there is a critical groove depth. The grooves should be shallower than this critical value in order to obtain a laser oscillation and the surface plasmon enhancement effect. An enhancement factor of 2.4 is finally obtained when the VSAL is lased properly. These experimental results may be revelatory for the design and optimization of a VSAL.
表面等离子体调制纳米孔径垂直腔面发射激光器
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影响因子: 1.7
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