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arXiv 0810.3923physics.optics
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低阈值单向输出混沌微腔Laser

Chaotic Microcavity Laser with Low threshold and Unidirectional Output

Q. H. Song, H. Cao, B. Y. Liu, S. T. Ho, W. Fang, G. s . Solomon

摘要:

在这里,我们报告的激光作用,在利马松形GaAs微盘与量子点(QD)嵌入。虽然腔内射线动力学主要是混沌的,但由于波局部化,高$Q$模式集中在区域$χ> χ_c$中。全内反射的强光约束导致非常低的激光阈值。我们的测量结果表明,所有的激光模式输出在同一方向上,无论其波长和腔内模式结构。这种普遍的发射方向是由开放混沌腔中光线的定向相空间流动决定的。输出光束的发散角小于40度。单向性被证明是强大的对实际腔的形状和尺寸从设计值的小偏差。

英文摘要:

Here we report lasing action in limaçon-shaped GaAs microdisks with quantum dots (QDs) embedded. Although the intracavity ray dynamics is predominantly chaotic, high-$Q$ modes are concentrated in the region $χ> χ_c$ as a result of wave localization. Strong optical confinement by total internal reflection leads to very low lasing threshold. Our measurements show that all the lasing modes have output in the same direction, regardless of their wavelengths and intracavity mode structures. This universal emission direction is determined by directed phase space flow of optical rays in the open chaotic cavity. The divergence angle of output beam is less than 40 degree. The unidirectionality proves to be robust against small deviations of the real cavity shape and size from the designed values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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