Applied Sciences | |
Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices | |
Fangmei Liu1  Huang Guo1  Dong Zhao1  Ming Fang1  Dong Zhong1  Hui Cao2  Houhua Xiong3  Yonghong Hu3  | |
[1] School of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, China;School of Mathematics and Statistics, Hubei University of Science and Technology, Xianning 437100, China;School of Nuclear Technology and Chemical Biology, Hubei University of Science and Technology, Xianning 437100, China; | |
关键词: anti-parity-time symmetry; unidirectional invisibility; unidirectional laser; lateral shift; periodic lattice; | |
DOI : 10.3390/app9183808 | |
来源: DOAJ |
【 摘 要 】
Complex anti-parity-time symmetric periodic lattices, in a wide frequency band, can act as unidirectional invisible media. The reflection from one end is suppressed while it is enhanced from the other. Furthermore, unidirectional laser points (ULPs) which correspond to the poles of reflection from one end, arise in the parameter space composed of the permittivity and angular frequency. The phase of the reflection coefficient changes sharply near the ULPs. Subsequently, large lateral shift which is proportional to the slope of phase could be induced for the reflected beam. The study may find great applications in unidirectional invisibility, unidirectional lasers and highly sensitive sensors.
【 授权许可】
Unknown