Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration
Group delay of the optical pulse reflected from the structure composed of graphene and one dimensional photonic crystal (1D PC) is studied. It is shown that the large negative group delay in this configuration can be realized due to the excitation of the optical Tamm state (OTS) at a graphene-dielec...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2019/9217613 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558177708670976 |
|---|---|
| author | Jiao Tang Jiao Xu Hui Zhou Zhiwei Zheng Yuxiang Zhou Rui Weng Yueying Wei Yue Liu Qiwei Liu Leyong Jiang Shengyou Qian |
| author_facet | Jiao Tang Jiao Xu Hui Zhou Zhiwei Zheng Yuxiang Zhou Rui Weng Yueying Wei Yue Liu Qiwei Liu Leyong Jiang Shengyou Qian |
| author_sort | Jiao Tang |
| collection | DOAJ |
| description | Group delay of the optical pulse reflected from the structure composed of graphene and one dimensional photonic crystal (1D PC) is studied. It is shown that the large negative group delay in this configuration can be realized due to the excitation of the optical Tamm state (OTS) at a graphene-dielectric interface. The reflected group delay can be enlarged negatively and can be switched from positive to negative or vice versa. We show that the conductivity of graphene has a significant influence on reflected group delay, making the graphene-PC structure be a good candidate for dynamic tunable optical delay device in the THz frequencies. Furthermore, the influences of the relaxation time of graphene, the incident angel, and the dispersion characteristics of top layer on group delay are clarified. |
| format | Article |
| id | doaj-art-5ce78e3e52dd47a8a8146c57e673fda9 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-5ce78e3e52dd47a8a8146c57e673fda92025-02-03T01:33:03ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242019-01-01201910.1155/2019/92176139217613Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror ConfigurationJiao Tang0Jiao Xu1Hui Zhou2Zhiwei Zheng3Yuxiang Zhou4Rui Weng5Yueying Wei6Yue Liu7Qiwei Liu8Leyong Jiang9Shengyou Qian10College of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Information Science and Engineering, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaCollege of Physics and Electronic Science, Hunan Normal University, Changsha 410081, ChinaGroup delay of the optical pulse reflected from the structure composed of graphene and one dimensional photonic crystal (1D PC) is studied. It is shown that the large negative group delay in this configuration can be realized due to the excitation of the optical Tamm state (OTS) at a graphene-dielectric interface. The reflected group delay can be enlarged negatively and can be switched from positive to negative or vice versa. We show that the conductivity of graphene has a significant influence on reflected group delay, making the graphene-PC structure be a good candidate for dynamic tunable optical delay device in the THz frequencies. Furthermore, the influences of the relaxation time of graphene, the incident angel, and the dispersion characteristics of top layer on group delay are clarified.http://dx.doi.org/10.1155/2019/9217613 |
| spellingShingle | Jiao Tang Jiao Xu Hui Zhou Zhiwei Zheng Yuxiang Zhou Rui Weng Yueying Wei Yue Liu Qiwei Liu Leyong Jiang Shengyou Qian Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration Advances in Condensed Matter Physics |
| title | Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration |
| title_full | Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration |
| title_fullStr | Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration |
| title_full_unstemmed | Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration |
| title_short | Enhanced Reflected Group Delay with Optical Tamm State via Graphene-Dielectric Bragg Mirror Configuration |
| title_sort | enhanced reflected group delay with optical tamm state via graphene dielectric bragg mirror configuration |
| url | http://dx.doi.org/10.1155/2019/9217613 |
| work_keys_str_mv | AT jiaotang enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT jiaoxu enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT huizhou enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT zhiweizheng enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT yuxiangzhou enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT ruiweng enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT yueyingwei enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT yueliu enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT qiweiliu enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT leyongjiang enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration AT shengyouqian enhancedreflectedgroupdelaywithopticaltammstateviagraphenedielectricbraggmirrorconfiguration |