Two-photon pumped lasing in a single CdS microwire
Two-photon pumped lasing in a single CdS microwire
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DOI：
10.1063/1.4809537
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发表时间：
2013-05
影响因子：
4
通讯作者：
Lichao Zhang;Kai Wang;Zhe Liu;Guang Yang;G. Shen;P. Lu
中科院分区：
文献类型：
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作者：
Lichao Zhang;Kai Wang;Zhe Liu;Guang Yang;G. Shen;P. Lu
本文报道了在波长为800 nm的飞秒脉冲激光激发下单根CdS微线的双光子吸收诱导激光性能。锐利的激光峰以523 nm为中心，平均线宽为0.4 nm，表明高品质因子为1300。激光发射高度依赖于激发光的偏振方向，当偏振方向平行于微线轴时，估计优化后的激光阈值为3.3 mJ/cm2。此外，通过时域有限差分方法证实了偏振相关的激光效应。
We report the two-photon absorption induced lasing performance in a single CdS microwire under the excitation of a femtosecond pulse laser with a wavelength of 800 nm. Sharp lasing peaks are centered at 523 nm with an average linewidth of 0.4 nm, indicating a high quality factor of 1300. The lasing emission is highly dependent on the polarization direction of the excitation light and the optimized lasing threshold is estimated to be 3.3 mJ/cm2 as the polarization direction is parallel to the microwire axis. Furthermore, the polarization-dependent lasing effect is confirmed by performing the finite-difference time-domain method.