Vertically Emitting Indium Phosphide Nanowire Lasers
Vertically Emitting Indium Phosphide Nanowire Lasers
复制标题
垂直发射磷化铟纳米线激光器
DOI：
10.1021/acs.nanolett.8b00334
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发表时间：
2018-06-01
期刊：
影响因子：
10.8
通讯作者：
Jagadish, Chennupati
中科院分区：
文献类型：
--
作者：
Xu, Wei-Zong;Ren, Fang-Fang;Jagadish, Chennupati
半导体纳米线（NW）激光器因其在纳米级光子源方面的出色前景而吸引了大量的研究工作。然而，纳米线激光器目前表现出较差的方向性和高阈值增益，这些问题严重限制了它们作为占用空间极小且功耗高效的片上光源的前景。在这里，我们提出了一种新的设计并通过实验演示了一种垂直发射的磷化铟（InP）纳米线激光器结构，该结构具有高发射方向性和降低的运行能量需求。该激光器的结构将 InP NW 集成在猫眼 (CE) 天线中。得益于打破不对称性的天线引导、强聚焦能力和高Q值，所设计的InP CE-NW激光器表现出更高的偏振度、更窄的发射角、增强的内量子效率和降低的激光阈值。因此，这种纳米线激光天线系统为实现高性能纳米级激光器提供了一种非常有前途的方法，在当前和未来的集成纳米光子系统中用作高度局域化光源，应用于先进传感、高分辨率成像和量子通信方面具有良好的前景。
Semiconductor nanowire (NW) lasers have attracted considerable research effort given their excellent promise for nanoscale photonic sources. However, NW lasers currently exhibit poor directionality and high threshold gain, issues critically limiting their prospects for on-chip light sources with extremely reduced footprint and efficient power consumption. Here, we propose a new design and experimentally demonstrate a vertically emitting indium phosphide (InP) NW laser structure showing high emission directionality and reduced energy requirements for operation. The structure of the laser combines an InP NW integrated in a cat's eye (CE) antenna. Thanks to the antenna guidance with broken asymmetry, strong focusing ability, and high Q-factor, the designed InP CE-NW lasers exhibit a higher degree of polarization, narrower emission angle, enhanced internal quantum efficiency, and reduced lasing threshold. Hence, this NW laser-antenna system provides a very promising approach toward the achievement of high-performance nanoscale lasers, with excellent prospects for use as highly localized light sources in present and future integrated nanophotonics systems for applications in advanced sensing, high-resolution imaging, and quantum communications.