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Dynamic modulation in graphene-integrated silicon photonic crystal nanocavity.
- Source :
-
Chinese Physics B . Jun2021, Vol. 30 Issue 6, p1-7. 7p. - Publication Year :
- 2021
-
Abstract
- Silicon-based electro-optic modulators are the key devices in integrated optoelectronics. Integration of the graphene layer and the photonic crystal (PC) cavity is a promising way of achieving compact modulators with high efficiency. In this paper, a high-quality (Q) acceptor-type PC nanocavity is employed to integrate with a single-layer graphene for realizing strong modulation. Through tuning the chemical potential of graphene, a large wavelength shift of 2.62 nm and a Q factor modulation of larger than 5 are achieved. A modulation depth (12.8 dB) of the reflection spectrum is also obtained. Moreover, the optimized PC nanocavity has a large free spectral range of 131.59 nm, which can effectively enhance the flexibility of the modulator. It shows that the proposed graphene-based PC nanocavity is a potential candidate for compact, high-contrast, and low-power absorptive modulators in integrated silicon chips. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOTONIC crystals
*SILICON crystals
*QUALITY factor
*CHEMICAL potential
*GRAPHENE
Subjects
Details
- Language :
- English
- ISSN :
- 16741056
- Volume :
- 30
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Chinese Physics B
- Publication Type :
- Academic Journal
- Accession number :
- 153377292
- Full Text :
- https://doi.org/10.1088/1674-1056/abda2b