Predicting Graphene's Nonlinear‐Optical Refractive Response for Propagating Pulses,Laser & Photonics Reviews

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Predicting Graphene's Nonlinear‐Optical Refractive Response for Propagating Pulses
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-05-14 , DOI: 10.1002/lpor.201900402
David Castelló‐Lurbe ₁ , Hugo Thienpont ₁ , Nathalie Vermeulen ₁

Affiliation

Nonlinear‐optical refraction is typically described by means of perturbation theory near the material's equilibrium state. Graphene, however, can easily move far away from its equilibrium state upon optical pumping, yielding strong nonlinear responses that cannot be modeled as mere perturbations. So far, one is still lacking the required theoretical expressions to make predictions for these complex nonlinear effects and to account for their evolution in time and space. Here, this long‐standing issue is solved by the derivation of population‐recipe‐based expressions for graphene's nonperturbative nonlinearities. The presented framework successfully predicts and explains the various nonlinearity magnitudes and signs observed for graphene over the past decade, while also being compatible with the nonlinear pulse propagation formalism commonly used for waveguides.

中文翻译：

预测石墨烯传播脉冲的非线性光学折射响应

非线性光学折射通常通过扰动理论来描述材料的平衡态。但是，石墨烯在光泵浦时很容易远离平衡状态，产生强烈的非线性响应，无法将其建模为单纯的扰动。到目前为止，仍然缺少所需的理论表达式来对这些复杂的非线性效应进行预测并解释其在时间和空间上的演化。在这里，这一长期存在的问题通过推导基于石墨烯的非扰动非线性的基于人口食谱的表达式来解决。提出的框架成功地预测和解释了过去十年中石墨烯的各种非线性幅度和符号，

更新日期：2020-05-14

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