单负材料异质结构中损耗诱导的场局域增强和光学双稳态

发布时间：2018-06-13 20:09

本文选题：单负特异材料 + 损耗　；参考：《物理学报》2016年11期

【摘要】：光学双稳态的阈值取决于非线性材料中的场局域程度,场局域越强,阈值越低.而材料的损耗是影响场局域强弱的重要因素.之前,人们普遍认为,增加损耗会削弱场局域,不利于降低阈值.本文研究了由磁单负材料和电单负材料组成的异质结构中光学双稳态现象,发现随着损耗的增大,其阈值可以呈现先降后升的非单调变化.进一步研究表明,异质结构界面处的电磁场强度随着损耗增大呈现先降后升的非单调变化,即增加损耗也有可能增强场局域.研究结果揭示了场局域程度与材料损耗之间的非单调依赖关系,为设计开发非线性功能器件提供了新的思路.
[Abstract]:The threshold of optical bistability depends on the field localization in nonlinear materials, and the stronger the field localization is, the lower the threshold is. The material loss is an important factor affecting the local field strength. Previously, it was widely believed that increasing the loss would weaken the local field and decrease the threshold. In this paper, the optical bistability in a heterostructure composed of magnetic mono-negative material and electrically mono-negative material is studied. It is found that the threshold value of the optical bistable state changes with the increase of loss. Further studies show that the intensity of the electric magnetic field at the interface of the heterostructure decreases first and then rises with the increase of the loss, that is, the increase of the loss may also enhance the local field. The results reveal the nonmonotonic dependence between the field local degree and the material loss, and provide a new idea for the design and development of nonlinear functional devices.
【作者单位】：山西大同大学固体物理研究所;山西大同大学微结构电磁功能材料省市共建山西省重点实验室;山西大同大学新型微结构功能材料山西省高等学校重点实验室;广西科技大学计算机科学与通信工程学院;同济大学波耳固体物理研究所;
【基金】：国家自然科学基金(批准号:11274207,11504210,11504211,11264003;11204217) 山西省科技攻关项目(批准号:2015031002-2) 山西省自然科学基金(批准号:2013011007-2,2013021010-5) 大同市科技攻关项目(批准号:2015015,201308,201422-3)资助的课题~~
【分类号】：O734

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