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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 Mobility, High performance, Low Energy Consumption, Optical devices, Photonic crystal structure, Quality-factor(Q-factor), Terahertz frequency, Transmission Spectrum, highly efficient
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
