14 May 2018 Tunable plasmon-induced transparency based on asymmetric coupling in three-dimensional Dirac semimetal
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Abstract
We demonstrate a plasmonic analog of electromagnetically induced transparency in a simple planar metamaterial structure, which consists of two bright three-dimensional (3-D) Dirac semimetal films (DSFs). Through the coupling in the asymmetric elements, a pronounced transparency peak within a broad transmission resonance spectrum is activated. In addition, the transmission spectrum can be tuned by varying the Fermi energy of 3-D Dirac semimetal. Moreover, higher group delays of more than 6 ps are obtained under different energies, and we can achieve the capability of controlling the group delay by changing Fermi energy because of the spectral tunability. The proposed DSF-based plasmonically induced transparency system may pave the way for potential applications in tunable terahertz switching, sensors, and slow-light devices.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiaohan Guo, Huiyun Zhang, Huan Chen, Yuping Zhang, "Tunable plasmon-induced transparency based on asymmetric coupling in three-dimensional Dirac semimetal," Optical Engineering 57(5), 057104 (14 May 2018). https://doi.org/10.1117/1.OE.57.5.057104 Submission: Received 17 March 2018; Accepted 25 April 2018
Submission: Received 17 March 2018; Accepted 25 April 2018
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