Lasing-Polarization-Dependent Output from Orthogonal Waveguides in High-Index-Contrast Subwavelength Grating Vertical-Cavity Surface-Emitting Laser
Lasing-Polarization-Dependent Output from Orthogonal Waveguides in High-Index-Contrast Subwavelength Grating Vertical-Cavity Surface-Emitting Laser
复制标题
DOI：
10.7567/apex.6.092106
复制
发表时间：
2013-09
影响因子：
2.3
通讯作者：
Yoshihiro Tsunemi;K. Ikeda;H. Kawaguchi
中科院分区：
文献类型：
--
作者：
Yoshihiro Tsunemi;K. Ikeda;H. Kawaguchi
提出了一种高折射率对比度亚波长光栅垂直腔面发射激光器（HCG-VCSEL），该激光器采用偏振无关的HCG与两个正交的面内输出波导耦合，并采用三维时域有限差分法对波导的光输出特性进行了数值研究。光在垂直于谐振模偏振方向上的耦合比在平行于谐振模偏振方向上的耦合强。波导之间的消光比为11.9，表明输出波导可以通过改变激光偏振来切换。在强耦合和弱耦合波导中的传播模式分别是TE和TM模式。
We propose a high-index-contrast subwavelength grating vertical-cavity surface-emitting laser (HCG-VCSEL) incorporating a polarization-independent HCG coupled with two orthogonal in-plane output waveguides and numerically investigate the optical output characteristics from the waveguides using a three-dimensional finite-difference time-domain method. The light coupled more strongly to the waveguide in the direction perpendicular to the polarization of the resonant mode than to that in the parallel direction. The extinction ratio between the waveguides was 11.9, indicating that the output waveguide can be switched by changing the lasing polarization. The propagating modes in the strongly and weakly coupled waveguides were the TE and TM modes, respectively.