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光波相位梯度对负折射和负反射的影响
供稿: 周思华;郭艳花;周小东 时间: 2018-11-12 次数:

作者:周思华郭艳花;周小东

作者单位:周口师范学院物理与机电工程学院

摘要:为进一步研究异常折射和反射定律,用Matlab仿真模拟了广义斯涅尔定律。模拟结果显示,入射角θi大于θrc(临界角)时反射光消失,θrc随着相位梯度的增大而减小变为负值,出现负反射;入射角θi大于θtc(临界角)时折射光消失而出现全反射,随着相位梯度的增大θtc减小变为负值,出现负折射。适当选择相位梯度,可以使入射光发生异常反射和折射,这些现象将会在隐身、相位调制和光束控制等领域得到广泛应用。

基金:国家自然科学基金资助项目(11405280); 河南省教育厅自然科学基金资助项目(16B140006); 周口师范学院青年基金资助项目(zknub315203);

关键词:超表面; 斯涅耳定律; Matlab仿真; 相位梯度;

DOI:10.16186/j.cnki.1673-9787.2016.06.023

分类号:O435.1

Abstract:For further study on the laws of anomalous refraction and reflection,the Matlab software were used to simulate the generalized Snell's law. The results of simulation show that the reflected light disappeared when the incident angle is greater than critical angle when it decreases with the increase of phase gradient turned negative,negative reflection phenomenon occured. Refraction of light disappears and total reflection appears if the incident angle is greater than critical angle when it decreases with the increase of phase gradient until it was negative,negative refraction phenomenon occured. As choosing appropriate phase gradient,negative reflection and negative refraction may occur. These phenomenon will be applied widely in cloaking,modulating phase,controlling light beams.

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