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Journal Article
Highly efficient graphene terahertz modulator with tunable electromagnetically induced transparency-like transmission
- Authors
- Myunghwan Kim, Seong‑Han Kim, Chul Kang, Soeun Kim, Chul‑Sik Kee
- Issue Date
- 2023-04
- Citation
- Scientific Reports, v.13, pp.1-7
- ISSN
- 2045-2322
- Publisher
- Nature Publishing Group
- Language
- English
- Type
- Journal Article
- Abstract
- Graphene-based optical modulators have been extensively studied owing to the high mobility and tunable permittivity of graphene. However, weak graphene-light interactions make it difficult to achieve a high modulation depth with low energy consumption. Here, we propose a high-performance graphene-based optical modulator consisting of a photonic crystal structure and a waveguide with graphene that exhibits an electromagnetically-induced-transparency-like (EIT-like) transmission spectrum at terahertz frequency. The high quality-factor guiding mode to generate the EIT-like transmission enhances light-graphene interaction, and the designed modulator achieves a high modulation depth of 98% with a significantly small Fermi level shift of 0.05 eV. The proposed scheme can be utilized in active optical devices that require low power consumption.
- KSP Keywords
- Electromagnetically induced transparency-like, Fermi level shift, High performance, Highly efficient, Low Power consumption, Optical modulator, Photonic crystal structure, Quality factor(VSWR and Q), Terahertz frequency, Transmission Spectrum, electromagnetically induced transparency(EIT)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
