Multiple resonant excitations of surface plasmons in a graphene stratified slab by Otto configuration and their independent tuning
Multiple resonant excitations of surface plasmons in a graphene stratified slab are realized by Otto configuration at terahertz frequencies. The proposed graphene stratified slab consists of alternating dielectric layers and graphene sheets, and is sandwiched between a prism and another semi-infinite medium. Optical response and field distribution are determined by the transfer matrix method with the surface current density boundary condition. Multiple resonant excitations appear on the angular reflection spectrum, and are analyzed theoretically via the phase-matching condition. Furthermore, the effects of the system parameters are investigated. Among them, the Fermi levels can tune the corresponding resonances independently. The proposed concept can be engineered for promising applications, including angular selective or multiplex filters, multiple channel sensors, and directional delivery of energy.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (11604276, 61601393, 11501481); Key Scientific Project of Fujian Province in China (2015H0039).
Ying Chen：Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen 361005, China
Longfang Ye：Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen 361005, China
Na Liu：Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen 361005, China
Guoxiong Cai：Institute of Electromagnetics and Acoustics, and Department of Electronic Science, Xiamen University, Xiamen 361005, China
Qing Huo Liu：Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA
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Jin Yao, Ying Chen, Longfang Ye, Na Liu, Guoxiong Cai, and Qing Huo Liu, "Multiple resonant excitations of surface plasmons in a graphene stratified slab by Otto configuration and their independent tuning," Photonics Research 5(4), 377 (2017)