Cavity enhanced third harmonic generation in graphene
Cavity enhanced third harmonic generation in graphene
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DOI：
10.1063/1.4999054
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发表时间：
2018-01
影响因子：
4
通讯作者：
Chris Beckerleg;Thomas J. Constant;I. Zeimpekis;S. M. Hornett;C. Craig;D. Hewak;E. Hendry
中科院分区：
文献类型：
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作者：
Chris Beckerleg;Thomas J. Constant;I. Zeimpekis;S. M. Hornett;C. Craig;D. Hewak;E. Hendry
石墨烯显示出令人惊讶的大的三阶非线性。在这里，我们报告说，转换效率接近10-4是可能的三次谐波产生（THG）。此外，石墨烯的原子薄性质允许在腔设计中简单集成以进一步增加这一点。我们证明了一个117倍的增强，共振与非共振波长的THG从石墨烯由于石墨烯层与谐振腔的集成。这种大的增强发生在谐振腔对基波场和三次谐波都谐振时。我们使用时域有限差分法模拟这种效应。通过将我们的模型与实验进行比较，我们能够推导出石墨烯的体三阶极化率的值，|χ（3）|=4×10−17（m/V）2。
Graphene displays a surprisingly large third order nonlinearity. Here, we report that conversion efficiencies approaching 10–4 are possible for third harmonic generation (THG). Moreover, the atomically thin nature of graphene allows for simple integration in cavity designs to increase this even further. We demonstrate a 117-fold enhancement, of resonant vs non-resonant wavelengths in the THG from graphene due to the integration of a graphene layer with a resonant cavity. This large enhancement occurs as the cavity is resonant for both the fundamental field and the third harmonic. We model this effect using the finite difference time domain approach. By comparing our model with experiment, we are able to deduce the value of a bulk third order susceptibility of graphene of |χ(3)|=4×10−17(m/V)2.