Lasing band-edge identification for a surface-emitting photonic crystal laser
Lasing band-edge identification for a surface-emitting photonic crystal laser
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DOI：
10.1109/jsac.2005.851205
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发表时间：
2005-07-01
影响因子：
16.4
通讯作者：
Noda, S
中科院分区：
文献类型：
--
作者：
Sakai, K;Miyai, E;Noda, S
由于在光子带边缘发射的光子晶体激光器有可能在较大的腔面积上实现单模振荡，这使得人们对这种新型固体激光器的材料产生了极大的兴趣。在本文中，我们测量了我们的样品中的光子能带结构，并识别了激光带边。通过绘制伽马点的能带结构，我们观察到了能带边缘的精细结构。实验结果与理论预测的能带结构吻合较好。在阈值以上，我们在其中一个带边观察到一个965 nm的激光峰值。测量了激光的远场分布，显示出环形轮廓和方位偏振。对激光带边的远场分布的计算表明，环形轮廓是由反对称谐振模引起的。
The possibility of single-mode oscillation over a large cavity area for photonic crystal lasers emitting at the photonic band edge has resulted in much interest in such materials for new forms of solid-state laser. In this paper, we measure the photonic band-structure in our sample and identify the lasing band edge. By mapping out the bandstructure at the Gamma-point, we have observed fine structure at the band edge. The experimental results are in good agreement with the theoretically predicted bandstructure. Above threshold, we observe a lasing peak at 965 nm at one of the band edges. The far-field distribution of the laser is measured, showing an annular profile and azimuthal polarization. Calculations on the far-field distribution at the lasing band edge suggest the annular profile is due to an anti-symmetric resonant mode.