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Theory of the giant plasmon-enhanced second-harmonic generation in graphene and semiconductor two-dimensional electron systems

机译:石墨烯和半导体二维电子系统中巨型等离激元增强的第二谐波产生的理论

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摘要

An analytical theory of the nonlinear electromagnetic response of a two-dimensional (2D) electron system in the second order in the electric field amplitude is developed. The second-order polarizability and the intensity of the second harmonic signal are calculated within the self-consistent-field approach both for semiconductor 2D electron systems and for graphene. The second harmonic generation in graphene is shown to be about 2 orders of magnitude stronger than in GaAs quantum wells at typical experimental parameters. Under the conditions of 2D plasmon resonance the second harmonic radiation intensity is further increased by several orders of magnitude.
机译:建立了二维(2D)电子系统在电场振幅​​中的非线性电磁响应的解析理论。在半导体2D电子系统和石墨烯的自洽场方法中,均可以计算出二次极化率和二次谐波信号的强度。在典型的实验参数下,石墨烯中的二次谐波产生比GaAs量子阱中的强大约2个数量级。在二维等离子体激元共振的条件下,二次谐波辐射强度进一步增加了几个数量级。

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