Analogue of Fano resonance and electromagnetically induced transparency in a graphene strip-ring compact resonator

A multi-band analogue electromagnetically induced transparency (A-EIT) metamaterial is proposed. The structure is composed of liquid crystal (LC) layer and a graphene strips layer on both sides of silicon dioxide. The transmission spectrum and electric field distribution of only one graphene strip and two graphene strips have been studied. As a bright mode, the graphene strip is coupled with adjacent graphene strip to realize the A-EIT effect. When multiple graphene strips are coupled with each other, the multi-band A-EIT is obtained due to the electric dipole resonances of the four strips. The results show that the multiband A-EIT effect can be tuned by voltage on LC and graphene layer, respectively. Moreover, changing the incident angle of the electromagnetic wave has had little influence on the transmission window in the low frequency band, it is meaning that the A-EIT effect with insensitive to the incident angle can be obtained. Each transmission window has a high maximum transmittance and figure of merit (FOM). The multi-band A-EIT effect can widen the application on sensor and optical storage devices.

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Slow Light without Electromagnetically-Induced Transparency: The Double-Fano Resonance Approach

Conference on Lasers and Electro-Optics 2010 ◽

10.1364/qels.2010.qthe7 ◽

2010 ◽

Author(s):

Gennady Shvets ◽

Chih-Hui Wu ◽

Alexander Khanikaev

Keyword(s):

Fano Resonance ◽

Slow Light ◽

Electromagnetically Induced Transparency ◽

Induced Transparency

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Engineering the fano resonance and electromagnetically induced transparency in near-field coupled bright and dark metamaterial

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/48/3/035104 ◽

2014 ◽

Vol 48 (3) ◽

pp. 035104 ◽

Cited By ~ 21

Author(s):

Song Han ◽

Ranjan Singh ◽

Longqing Cong ◽

Helin Yang

Keyword(s):

Fano Resonance ◽

Electromagnetically Induced Transparency ◽

Near Field ◽

Induced Transparency

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Graphene plasmonically induced analogue of tunable electromagnetically induced transparency without structurally or spatially asymmetry

Scientific Reports ◽

10.1038/s41598-019-56745-9 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 1

Author(s):

Yuwen He ◽

Jianfa Zhang ◽

Wei Xu ◽

Chucai Guo ◽

Ken Liu ◽

...

Keyword(s):

Numerical Simulation ◽

Fano Resonance ◽

Electromagnetically Induced Transparency ◽

Plasmon Coupling ◽

Graphene Ribbon ◽

Dark Mode ◽

Physical Understanding ◽

Coherent Coupling ◽

Induced Transparency ◽

Bright Mode

AbstractElectromagnetically induced transparency (EIT) arises from the coherent coupling and interference between a superradiant (bright) mode in one resonator and a subradiant (dark) mode in an adjacent resonator. Generally, the two adjacent resonators are structurally or spatially asymmetric. Here, by numerical simulation, we demonstrate that tunable EIT can be induced by graphene ribbon pairs without structurally or spatially asymmetry. The mechanism originates from the fact that the resonate frequencies of the bright mode and the dark mode supported by the symmetrical graphene ribbon pairs can be respectively tuned by electrical doping levels, and when they are tuned to be equal the graphene plasmon coupling and interference occurs. The EIT in symmetrical nanostructure which avoids deliberately breaking the element symmetry in shape as well as in size facilitates the design and fabrication of the structure. In addition, the work regarding to EIT in the structurally symmetric could provide a fresh contribution to a more comprehensive physical understanding of Fano resonance.

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