铁氧体(磁铁)
电磁辐射
光学
太赫兹辐射
电介质
波长
全内反射
物理
入射角(光学)
传递矩阵法(光学)
材料科学
光电子学
量子力学
作者
Yuan-Kun Shi,Bao-Fei Wan,Haifeng Zhang
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2022-04-13
卷期号:24 (5): 055103-055103
被引量:4
标识
DOI:10.1088/2040-8986/ac5f22
摘要
Abstract Leveraging the traditional transfer matrix and stationary phase methods, the nonreciprocal Goos–Hänchen (GH) phenomena for the electromagnetic (EM) waves reflected at the surface of the one-dimensional photonic crystals with ferrite layers and dielectric layers are investigated numerically. The GH effect (the peak of the lateral shift value up to over 200 times the wavelength) produced by the forward and backward incidence of EM waves under the transverse electric wave is identified to arise at significantly different frequency positions in the terahertz (THz) regime, whereas the transverse magnetic wave produces almost no GH effect under the same condition. Based on such a nonreciprocal phenomenon, the effect of the incident angle on the nonreciprocal properties is covered initially, for every 20° increase in the angle of the incident TE wave, the frequency span at which the two GH shift peaks emerge will decrease by 0.1 THz. In addition, the thicknesses of dielectric layers are modified separately, and distinct sensitivities of them to the nonreciprocal phenomenon are displayed. Lastly, through the regulation of the external magnetic fields of ferrite layers, the nonreciprocal effect can be selectively presented in multiple forms, which provides a novel pathway to design nonreciprocal sensors.
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