Regenerative oscillation and four-wave mixing in graphene optoelectronics
Regenerative oscillation and four-wave mixing in graphene optoelectronics
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DOI：
10.1038/nphoton.2012.147
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发表时间：
2012-08-01
期刊：
影响因子：
35
通讯作者：
Wong, C. W.
中科院分区：
文献类型：
--
作者：
Gu, T.;Petrone, N.;Wong, C. W.
石墨烯在纯二维狄拉克费米子结构中独特的线性和无质量能带结构导致了从凝聚态物理到纳米级器件应用的广泛研究，涵盖了电学，热学，机械和光学领域。在这里，我们报告了三个连续的第一次观察石墨烯-硅混合光电器件超低功率谐振光学双稳态，自诱导再生振荡和相干四波混频-所有在几个毫微微焦耳腔循环能量。这些观察结果与仅在单片硅腔上进行的控制测量相比，仅通过石墨烯中极大且超快的χ（3）非线性和波长局域光子晶体腔中的大Q/V比才能实现。这些三阶非线性结果证明了混合二维石墨烯-硅纳米光子器件用于下一代芯片级高速光通信、射频光电子学和全光信号处理的可行性和多功能性。
The unique linear and massless band structure of graphene in a purely two-dimensional Dirac fermionic structure has led to intense research in fields ranging from condensed matter physics to nanoscale device applications covering the electrical, thermal, mechanical and optical domains. Here, we report three consecutive first observations in graphene-silicon hybrid optoelectronic devices-ultralow-power resonant optical bistability, self-induced regenerative oscillations and coherent four-wave mixing-all at few-femtojoule cavity recirculating energies. These observations, in comparison with control measurements on solely monolithic silicon cavities, are enabled only by the dramatically large and ultrafast chi((3)) nonlinearities in graphene and the large Q/V ratios in wavelength-localized photonic crystal cavities. These third-order nonlinear results demonstrate the feasibility and versatility of hybrid two-dimensional graphene-silicon nanophotonic devices for next-generation chip-scale high-speed optical communications, radiofrequency optoelectronics and all-optical signal processing.