Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices
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 o...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-09-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/9/18/3808 |
| _version_ | 1818138756250599424 |
|---|---|
| author | Hui Cao Dong Zhao Ming Fang Huang Guo Yonghong Hu Fangmei Liu Dong Zhong Houhua Xiong |
| author_facet | Hui Cao Dong Zhao Ming Fang Huang Guo Yonghong Hu Fangmei Liu Dong Zhong Houhua Xiong |
| author_sort | Hui Cao |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-11T10:17:15Z |
| format | Article |
| id | doaj.art-bb4229f4d549494b92970a5ec94f2a03 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-11T10:17:15Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-bb4229f4d549494b92970a5ec94f2a032022-12-22T01:11:35ZengMDPI AGApplied Sciences2076-34172019-09-01918380810.3390/app9183808app9183808Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic LatticesHui Cao0Dong Zhao1Ming Fang2Huang Guo3Yonghong Hu4Fangmei Liu5Dong Zhong6Houhua Xiong7School of Mathematics and Statistics, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Nuclear Technology and Chemical Biology, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Electronics and Information Engineering, Hubei University of Science and Technology, Xianning 437100, ChinaSchool of Nuclear Technology and Chemical Biology, Hubei University of Science and Technology, Xianning 437100, ChinaComplex 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.https://www.mdpi.com/2076-3417/9/18/3808anti-parity-time symmetryunidirectional invisibilityunidirectional laserlateral shiftperiodic lattice |
| spellingShingle | Hui Cao Dong Zhao Ming Fang Huang Guo Yonghong Hu Fangmei Liu Dong Zhong Houhua Xiong Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices Applied Sciences anti-parity-time symmetry unidirectional invisibility unidirectional laser lateral shift periodic lattice |
| title | Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices |
| title_full | Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices |
| title_fullStr | Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices |
| title_full_unstemmed | Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices |
| title_short | Unidirectional Invisibility Induced by Complex Anti-Parity–Time Symmetric Periodic Lattices |
| title_sort | unidirectional invisibility induced by complex anti parity time symmetric periodic lattices |
| topic | anti-parity-time symmetry unidirectional invisibility unidirectional laser lateral shift periodic lattice |
| url | https://www.mdpi.com/2076-3417/9/18/3808 |
| work_keys_str_mv | AT huicao unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT dongzhao unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT mingfang unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT huangguo unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT yonghonghu unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT fangmeiliu unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT dongzhong unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices AT houhuaxiong unidirectionalinvisibilityinducedbycomplexantiparitytimesymmetricperiodiclattices |