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Theory and characterization of elliptically polarized modes in vertical-cavity surface-emitting lasers

机译:垂直腔面发射激光器中椭圆偏振模的理论和表征

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The polarization of the beam emitted from telecom-wavelength vertical-cavity surface-emitting lasers (VCSELs) is studied in detail. Stokes parameters are extracted separately for the two polarization sub-modes of the fundamental spatial mode LP_(01). This characterization was performed at room temperature and for a significant number of devices. This led to the discovery of stable optical modes with a polarization that differs from the linear case. This crucial result was obtained without immersing the devices in an external magnetic field or driving them under external optical injection. In addition, the polarization can be tuned directly with the drive current. Moreover, the polarization handedness can be switched electrically. A theoretical investigation shows that some of the equations forming the basis of the spin-flip model should be reconsidered. In particular, a generalization of this theory is discussed and fantastic agreement is found with the experimental results. This work paves the way for a broad range of novel applications with the VCSEL technology, in particular for spintronics, bio-chemical sensing and telecommunication.
机译:详细研究了电信波长垂直腔面发射激光器(VCSEL)发出的光束的偏振。针对基本空间模式LP_(01)的两个极化子模式分别提取斯托克斯参数。此表征是在室温下和大量设备上进行的。这导致发现偏振态与线性情形不同的稳定光学模式。在不将设备浸入外部磁场或在外部光注入下驱动设备的情况下获得了至关重要的结果。此外,极化可以直接通过驱动电流进行调整。而且,极化电性可以电切换。理论研究表明,应该重新考虑构成自旋翻转模型基础的一些方程。特别是,对该理论进行了讨论,并与实验结果达成了惊人的一致性。这项工作为VCSEL技术为各种新型应用铺平了道路,尤其是自旋电子学,生化传感和电信领域。

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