Perfect near-infrared absorption of graphene with hybrid dielectric nanostructures
Near-infrared perfect wave harvesting of graphene is theoretically and numerically obtained in a hybrid dielectric configuration without assistance of a reflecting mirror. The absorption is increased 43-fold compared to a suspended graphene layer at normal incidence. The mechanism of perfect absorpt...
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| Veröffentlicht in: | Journal of materials science. Materials in electronics 2020-04, Vol.31 (8), p.5820-5826 |
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| container_end_page | 5826 |
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| container_issue | 8 |
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| container_title | Journal of materials science. Materials in electronics |
| container_volume | 31 |
| creator | Cao, Xiyuan Zhang, Yijin Han, Ziyang Li, Wenfei Liu, Guanyu Xue, Zhongying Jin, Yi Wu, Aimin |
| description | Near-infrared perfect wave harvesting of graphene is theoretically and numerically obtained in a hybrid dielectric configuration without assistance of a reflecting mirror. The absorption is increased 43-fold compared to a suspended graphene layer at normal incidence. The mechanism of perfect absorption is based on critical coupling with a guided resonance introduced by a silicon bar array and Fabry–Perot (FP) effect of a silicon oxide layer. This lossless design is expected to find applications to allow the active area with effective generation and fast transport of photocarriers, paving a new way for on-chip small-footprint ultrahigh responsivity and ultrahigh-speed photodetection in silicon photonics. |
| doi_str_mv | 10.1007/s10854-019-02549-6 |
| format | Article |
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| ispartof | Journal of materials science. Materials in electronics, 2020-04, Vol.31 (8), p.5820-5826 |
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| subjects | Characterization and Evaluation of Materials Chemistry and Materials Science Graphene Infrared absorption Materials Science Near infrared radiation Optical and Electronic Materials Photonics Silicon Silicon oxides |
| title | Perfect near-infrared absorption of graphene with hybrid dielectric nanostructures |
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