强激光与粒子束, 2010, 22 (8): 1745, 网络出版: 2010-09-15  

具有电与磁非线性效应超常介质中光束的聚焦特性

Beam focusing in metamaterials with electric and magnetic nonlinearities
作者单位
湖南大学 计算机与通信学院, 微纳光电器件及应用教育部重点实验室, 长沙 410082
摘要
基于Drude模型, 采用解析法与数值模拟法研究了具有电与磁非线性效应超常介质中光束的聚焦特性。结果表明超常材料中光束聚焦现象不但可以发生在自聚焦非线性介质中(正折射区)而且可以发生在自散焦非线性介质中(负折射区), 且光束中心频率离介质的等离子频率越近, 其聚焦效应越明显。特别是当电与磁非线性极化率为异号时, 超常介质的非线性符号可以通过调控电与磁等离子频率的相对大小控制, 这为主动操控光束的传输提供一种新的自由度。
Abstract
Based on the Drude mode, beam focusing in metamaterials with both electric and magnetic nonlinearities are investigated, both analytically and numerically. The results show that beam focusing occurs not only in self-focusing nonlinear materials (positive-index region), but also in self-defocusing nonlinear material (negative-index region). In addition, the self-focusing effect is stronger when the plasma frequency of the material shifts closer to the central frequency of the beam. In particular, when the signs for electric and magnetic susceptibilities are different, the sign of nonlinearity for metamaterials can be engineered by varying the relative magnitude between electric and the magnetic plasma frequencies. This provides us an alternative approach to manipulate beam propagation at will.

张景贵, 章礼富, 雷大军, 邓剑钦, 文双春. 具有电与磁非线性效应超常介质中光束的聚焦特性[J]. 强激光与粒子束, 2010, 22(8): 1745. Zhang Jinggui, Zhang Lifu, Lei Dajun, Deng Jianqin, Wen Shuangchun. Beam focusing in metamaterials with electric and magnetic nonlinearities[J]. High Power Laser and Particle Beams, 2010, 22(8): 1745.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!