中国物理B ›› 2019, Vol. 28 ›› Issue (5): 54201-054201.doi: 10.1088/1674-1056/28/5/054201
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Jian Wu(吴坚), Tao Wang(王涛), Tianyue Hou(侯天悦), Xuefen Kan(阚雪芬), Cheng Yin(殷澄), Pu Zhou(周朴), Zhuangqi Cao(曹庄琪)
Jian Wu(吴坚)1,4, Tao Wang(王涛)1, Tianyue Hou(侯天悦)1, Xuefen Kan(阚雪芬)2, Cheng Yin(殷澄)2,3,4, Pu Zhou(周朴)1, Zhuangqi Cao(曹庄琪)3
摘要: It is well-established that waves are inhomogeneous in a lossy isotropic medium, and the validation of the classical Snell's law is still questionable for light refraction at the dissipative and dispersive interface. With high absorption, direct experimental investigation is rather difficult due to the extremely short penetration depth; i.e., the skin depth. In this paper, a simple and unified description of this issue is proposed, which can be applied to both materials with anomalous dispersion and in the Drude region. The gradient ▽kω is found to be incident angle θi-dependent, and the direction of the group velocity may deviate significantly from the phase velocity due to the loss induced permittivity structure. The physics behind the negative refraction effect is explained, and a novel loss induced super-prism effect is also predicted.
中图分类号: (Wave propagation, transmission and absorption)