Polarization Responses of a Solitary and Optically Injected Vertical Cavity Spin Laser
Polarization Responses of a Solitary and Optically Injected Vertical Cavity Spin Laser
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DOI：
10.1109/jqe.2019.2940041
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发表时间：
2019-12-01
影响因子：
2.5
通讯作者：
Guina, Mircea
中科院分区：
文献类型：
--
作者：
Cemlyn, Benjamin R.;Henning, Ian D.;Guina, Mircea
实验研究了量子阱自旋垂直腔面发射激光器（自旋VCSEL）的偏振特性，包括无注入和变偏振光注入，并与自旋翻转模型（SFM）进行了比较。在没有注入的情况下，我们展示了两种不同类型的VCSEL泵浦响应，这取决于线宽增强因子、双折射和二向色性的符号：首先，泵浦和VCSEL具有相同的椭圆率符号，其次，VCSEL椭圆率伴随着线性偏振切换符号。我们表明，通过控制注入功率，椭圆率或线性角度，可以获得近圆偏振。这些响应都提供了深入了解电光注入的自旋VCSEL系统，并具有实际意义的使用自旋VCSEL在独特的应用中利用椭圆度的自由。
The polarisation properties of a quantum well spin & x2013; vertical cavity surface emitting laser (spin & x2013; VCSEL), both without injection and with variable polarisation optical injection, are investigated experimentally and compared with the spin flip model (SFM). Without injection, we demonstrate two distinct types of VCSEL-pump response depending on the signs of the linewidth enhancement factor, birefringence and dichroism: firstly where the pump and VCSEL have the same sign of the ellipticity, and secondly where the VCSEL ellipticity, accompanied by the linear polarisation, switches sign. We show that by controlling the injected power, ellipticity or linear angle, near circular polarisation can be obtained. These responses both give insight into the electro-optical injected spin-VCSEL system, and have practical implications for the use of spin VCSELs in unique applications exploiting the ellipticity degree of freedom.