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Tunable Multiple Plasmon-Induced Transparencies Based on Asymmetrical Grapheme Nanoribbon Structures
Chunyu Lu1, Jicheng Wang2, Shubin Yan3
1School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China. lchy_1994@163.com.
Materials (Basel, Switzerland)
|August 5, 2017
Summary
We demonstrate controllable plasmon-induced transparency (PIT) using graphene nanoribbon arrays. Gate voltage electrically tunes the PIT spectrum, showing potential for plasmonic sensors in nanophotonics.
Area of Science:
- Plasmonics
- Nanophotonics
- Condensed Matter Physics
Background:
- Plasmon-induced transparency (PIT) is a quantum interference effect.
- Graphene nanostructures offer tunable optical properties.
Purpose of the Study:
- To design and numerically simulate graphene-based plasmonic devices for controllable PIT.
- To investigate the tunability of PIT spectra via structural and electrical parameters.
Main Methods:
- Numerical simulation of periodic arrays of graphene nanoribbons (GNRs) and a graphene sheet waveguide.
- Analysis of bright and dark elements within the GNR-waveguide system.
Main Results:
- Electrically tunable PIT spectra achieved by applying gate voltage.
- Transmission dip shifts observed with adjustments in coupling distance and GNR widths.
- Splitting of transmission into multiple PIT peaks with increased angle of incidence.
Conclusions:
- Graphene plasmonic devices enable controllable PIT.
- These devices show promise for applications as plasmonic sensors in nanophotonics.
