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Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation
文献类型：期刊论文
| 作者 | Vermeulen, N.; Castello-Lurbe, D.; Khoder, M.; Pasternak, I.; Krajewska, A.; Ciuk, T.; Strupinski, W.; Cheng, J. L.; Thienpont, H.; Van Erps, J. |
| 刊名 | Nature Communications
 |
| 出版日期 | 2018 |
| 卷号 | 9页码:9 |
| ISSN号 | 2041-1723 |
| 关键词 | silicon wave-guides z-scan measurement refractive-index generation optoelectronics enhancement absorption mos2 Science & Technology - Other Topics |
| DOI | 10.1038/s41467-018-05081-z |
| 英文摘要 | Graphene is considered a record-performance nonlinear-optical material on the basis of numerous experiments. The observed strong nonlinear response ascribed to the refractive part of graphene's electronic third-order susceptibility chi((3)) cannot, however, be explained using the relatively modest chi((3)) value theoretically predicted for the 2D material. Here we solve this long-standing paradox and demonstrate that, rather than chi((3))-based refraction, a complex phenomenon which we call saturable photoexcited-carrier refraction is at the heart of nonlinear-optical interactions in graphene such as self-phase modulation. Saturable photoexcited-carrier refraction is found to enable self-phase modulation of picosecond optical pulses with exponential-like bandwidth growth along graphene-covered waveguides. Our theory allows explanation of these extraordinary experimental results both qualitatively and quantitatively. It also supports the graphene nonlinearities measured in previous self-phase modulation and self-(de) focusing (Z-scan) experiments. This work signifies a paradigm shift in the understanding of 2D-material nonlinearities and finally enables their full exploitation in next-generation nonlinear-optical devices. |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/60675]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | Vermeulen, N.,Castello-Lurbe, D.,Khoder, M.,et al. Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation[J]. Nature Communications,2018,9:9. |
| APA | Vermeulen, N..,Castello-Lurbe, D..,Khoder, M..,Pasternak, I..,Krajewska, A..,...&Van Erps, J..(2018).Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation.Nature Communications,9,9. |
| MLA | Vermeulen, N.,et al."Graphene's nonlinear-optical physics revealed through exponentially growing self-phase modulation".Nature Communications 9(2018):9. |
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