Abstract
The plasmon-induced transparency (PIT) in planar metasurface comprising of resonators having one S-shaped structure and a rectangular strip (both made of silver) was investigated. It was found that the S-shaped component of metasurface induces a single bright mode, whereas the rectangular strip manifests two bright modes with strong coupling of incidence electromagnetic waves. When both the metasurface components were placed in the proximity, the PIT-like phenomenon was observed. The effects of rotational angle of the metasurface as well as the angle of incidence on the transmission spectra (of the metasurface) were also investigated. Both the transverse electric (TE) and transverse magnetic (TM) waves were used to explore the PIT effect. It was noticed that the PIT window could be easily tuned by altering the horizontal distance between the resonator components (i.e., the S-shaped structure and rectangular strip). It is expected that the proposed metasurface structure would be prudent in switching, ultrafast sensing and optical applications.
Highlights
Vol 12, No 3, June 2020future challenges of optical communication systems, researchers have been developing varieties of photonic, and plasmonic structures during the last few years.Electromagnetically induced transparency (EIT) is the electromagnetic phenomenon that takes place in three-level atomic systems
The plasmon-induced transparency (PIT) in planar metasurface comprising of resonators having one S-shaped structure and a rectangular strip was investigated
We investigate the characteristics of Tunable and multiple PIT windows (TMPWs) in specially designed planar metasurface having the unit cell consisting of an S-shaped resonator and a rectangular strip, both made of silver
Summary
Induced transparency (EIT) is the electromagnetic phenomenon that takes place in three-level atomic systems. This results owing to the interference of the atomic resonance [25], [26]. Plasmon-induced transparency (PIT) is the analogues of EIT, usually observed in metamaterial structures [27]−[29], and remains an attractive topic for research. PIT got widespread applications in optical storage devices [30], nano-sensing [31], filtering [32], optical switching [33], etc. PIT with narrow window remains useful for sensing and switching applications [34], [35]. Switching applications of PIT have been reported in [38], [39]
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