论文标题
带有激光激光的直接生成径向极化矢量涡流束
Direct Generation of Radially Polarized Vector Vortex Beam with an Exciton-Polariton Laser
论文作者
论文摘要
向量涡流梁是一类光束，其空间变化极化。矢量涡流束激光器在许多领域都有应用，包括成像和通信，迄今为止，发射高斯梁的垂直腔激光器已被发射高斯梁。垂直腔激光器的矢量涡流光束产生需要外部控制或调制。在这里，通过利用极化选择性的亚波长度光栅作为垂直半导体微腔中的反射器之一，我们设计了极化模式的自旋纹理，并在单模，径向偏光矢量涡流束中演示了极性激光。发射的极化和相位分布的特征是偏振分辨的成像和干涉法。矢量涡流激光光束生成的这种方法允许阈值较低，稳定的单模操作，可扩展性和片上积分，所有这些对于成像和通信中的应用都很重要。
Vector vortex beams are a class of optical beams with singularities in their space-variant polarization. Vector vortex beam lasers have applications in many areas including imaging and communication, where vertical-cavity lasers emitting Gaussian beams have been most widely used so far. Generation of vector vortex beams from vertical-cavity lasers has required external control or modulation. Here, by utilizing a polarization-selective subwavelength grating as one of the reflectors in a vertical semiconductor microcavity, we design the spin textures of the polariton mode and demonstrate polariton lasing in a single-mode, radially polarized vector vortex beam. Polarization and phase distributions of the emission are characterized by polarization-resolved imaging and interferometry. This method of vector vortex laser beam generation allows low threshold power, stable single-mode operation, scalability, and on-chip integration, all of which are important for applications in imaging and communication.
