Fresnel filtering in lasing emission from scarred modes of wave-chaotic optical resonators
Fresnel filtering in lasing emission from scarred modes of wave-chaotic optical resonators
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DOI：
10.1103/physrevlett.88.094102
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发表时间：
2002-03-04
影响因子：
8.6
通讯作者：
Stone, AD
中科院分区：
文献类型：
--
作者：
Rex, NB;Tureci, HE;Stone, AD
研究了非对称谐振腔GaN微激光器的激光发射。通过比较微激光器的远场强度图案和图像，我们发现激光模式集中在三次反弹不稳定的周期射线轨道上，即，模式都伤痕累累。这些疤痕模式的高强度发射方向与将斯涅耳定律应用于射线轨道所预测的方向完全不同。这种效应是由于当有限角展度的光束以全内反射的临界角入射时发生的“菲涅耳滤波”过程。
We study lasing emission from asymmetric resonant cavity GaN microlasers. By comparing far-field intensity patterns with images of the microlaser we find that the lasing modes are concentrated on three-bounce unstable periodic ray orbits; i.e., the modes are scarred. The high-intensity emission directions of these scarred modes are completely different from those predicted by applying Snell's law to the ray orbit. This effect is due to the process of "Fresnel filtering" which occurs when a beam of finite angular spread is incident at the critical angle for total internal reflection.