Circularly polarized laser emission induced in isotropic and achiral dye systems.
Circularly polarized laser emission induced in isotropic and achiral dye systems.
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DOI：
10.1038/srep28740
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发表时间：
2016-06-28
影响因子：
4.6
通讯作者：
de la Moya S
中科院分区：
文献类型：
--
作者：
Cerdán L;García-Moreno S;Costela A;García-Moreno I;de la Moya S
高效、可调谐和可切换的圆偏振激光发射的产生将在光通信或生物光子学中具有深远的影响。在这项工作中，它是证明了直接产生的圆偏振（CP）激光发射的非手性和各向同性染料激光系统，而不使用腔外偏振元件，而不诉诸手性染料，手性液晶矩阵，或干涉方法。这种椭圆率的起因是由强的偏振激光泵浦引起的动态双折射和随后激发的分子偶极子的取向各向异性。作为不同的实验参数的函数的常规染料激光振荡器的偏振态的一个完整的偏振特性进行，它表明，所产生的光总是具有一定程度的圆度，以一种独特的方式与泵浦能量和偏振的变化。这些结果表明，它是可能的产生和调制CP激光从高效和光稳定的常规激光染料。
The production of efficient, tunable, and switchable circularly polarized laser emission would have far reaching implications in optical communications or biophotonics. In this work, it is demonstrated the direct generation of circularly polarized (CP) laser emission in achiral and isotropic dye laser systems without the use of extracavity polarizing elements, and without resorting to chiral dyes, chiral liquid crystal matrices, or interferometric methods. The origin of this ellipticity arises from the dynamic birefringence induced by the strong and polarized laser pumping and the subsequent orientation anisotropy of the excited molecular dipoles. A complete polarimetric characterization of the polarization state of conventional dye laser oscillators as a function of different experimental parameters is performed and it is shown that the generated light always possesses a certain level of circularity that changes in a distinctive way with pump energy and polarization. These results demonstrate that it is possible to generate and modulate CP laser light from efficient and photostable conventional laser dyes.