低阈值混合表面等离子体纳米激光器的仿真设计

发布时间：2018-06-08 19:58

本文选题：表面等离子体 + 有限元法　；参考：《光子学报》2017年08期

【摘要】：设计了一种包含圆柱形纳米线、空气间隙和半圆顶金属脊结构的低阈值纳米激光器.通过有限元法对激光器的模式特性、品质因数以及增益阈值进行数值计算,并研究了这些特性因子随结构几何参数(空气间隙、金属脊宽度和纳米线半径)的变化情况.结果表明,通过对参数进行调整,激光器的性能得到了显著优化.在最优参数下,增益阈值可达0.47μm-1,传输损耗仅为0.018.本文设计的纳米激光器能够实现低阈值的亚波长激射和低损耗传输,在生物医学、光通信等领域有广泛的应用前景,可为小型化和集成化的纳米设备提供技术支持.
[Abstract]:A low threshold nanocrystalline laser with cylindrical nanowires, air gaps and semicircular top metal ridges is designed. The mode characteristics, quality factor and gain threshold of the laser are numerically calculated by the finite element method, and the variation of these characteristic factors with the structural geometric parameters (air gap, metal ridge width and nanowire radius) is studied. The results show that the performance of the laser is significantly optimized by adjusting the parameters. Under the optimal parameters, the gain threshold is 0.47 渭 m ~ (-1) and the transmission loss is 0.018 渭 m ~ (-1). The nanocrystalline laser designed in this paper can realize low threshold subwavelength excitation and low loss transmission. It has a wide application prospect in biomedical, optical communication and other fields. It can provide technical support for miniaturization and integration of nanoscale devices.
【作者单位】：燕山大学电气工程学院;东北大学秦皇岛分校控制工程学院;
【基金】：河北省百人计划(No.4570018) 河北省自然科学基金(No.F2014501150)资助~~
【分类号】：TN248

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