arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.13445physics.opticsnlin.PS
收藏

混合石墨烯基光子波导中自由载流子诱导的非线性动力学

Free-carrier-induced nonlinear dynamics in hybrid graphene-based photonic waveguides

Ambaresh Sahoo, Andrea Marini, Samudra Roy

摘要:

我们从第一性原理出发,建立了石墨烯覆盖的混合波导中红外脉冲传播的理论模型。我们模拟电子动力学在石墨烯的布洛赫方程,使推导的非线性电导率和速率方程占自由载流子的产生。辐射传播是通过一个广义的非线性薛定谔方程耦合的场包络与速率方程占在石墨烯中的自由载流子的产生建模。我们的数值模拟清楚地表明,未扰动克尔孤子加速由于载流子诱导的折射率变化,并经历了强烈的自诱导光谱蓝移。基于孤子微扰理论的半解析预测充分解释了我们的数值结果。

英文摘要:

We develop from first principles a theoretical model for infrared pulse propagation in graphene-covered hybrid waveguides. We model electron dynamics in graphene by Bloch equations, enabling the derivation of the nonlinear conductivity and of a rate equation accounting for free-carrier generation. Radiation propagation is modeled through a generalized nonlinear Schrödinger equation for the field envelope coupled with the rate equation accounting for the generation of free carriers in graphene. Our numerical simulations clearly indicate that unperturbed Kerr solitons accelerate due to the carrier-induced index change and experience a strong self-induced spectral blueshift. Our numerical results are fully explained by semianalytical predictions based on soliton perturbation theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑