物理学报Issue(10)：1-7,7.DOI:10.7498/aps.63.104205
梯度负折射率介质中高斯光束传输特性的研究∗
Propagation prop erties of Gaussian b eam in gradient negative index of refraction material
摘要
Abstract
We apply the ABCD formalism to a gradient negative index medium (NIM) and investigate the propagation and transformation properties of Gaussian beams in this medium. First, we derive the ABCD formalism in a positive gradient NIM and obtain the propagation model. Spatial soliton and the spatial breather propagation in this medium are revealed. Our research suggests that the gradient coefficient has a significant effect on the focusing ability of slab. When the gradient coefficient increases, the quasi-lense effect becomes more prominent and notable. As a result, the focusing ability improves and the beam waist in the focal point shrinks. Second, when Gaussian beams propagate in the negative gradient NIM, the beam waist enlarges as the distance increases. There is neither spatial soliton phenomenon nor breather transmission phenomenon, which is completely different from the propagation characteristics in the positive gradient NIM.关键词
高斯光束/梯度负折射率介质/ABCD定律/传输特性Key words
Gaussian beam/gradient negative index media/ABCD law/propagation property引用本文复制引用
周建华,李栋华,曾阳素,朱鸿鹏..梯度负折射率介质中高斯光束传输特性的研究∗[J].物理学报,2014,(10):1-7,7.基金项目
国家自然科学基金(批准号:11247296)资助的课题.@@@@ Project supported by the National Natural Science Foundation of China (Grant No.11247296) （批准号:11247296）
