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arXiv 1809.02641physics.optics
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随机InAs光栅上石墨烯单层中表面等离子体波的温度可调安德森局域化

Temperature tunable Anderson localization for surface plasmon waves propagating in a graphene single layer placed on a random InAs grating

Abbas Ghasempour Ardakani, Marzieh Sedaghat Nejad

摘要:

在本文中,我们提出了一个一维无序等离子体结构的石墨烯单层放置在随机光栅组成的InAs。通过这种结构的等离子体波的传播进行了数值研究。通过计算不同无序强度系统的归一化局域化长度,确定系统是否处于局域化状态。对于某些频率,取决于无序水平,对于传播通过石墨烯层的等离子体波发生安德森局域化。此外,还研究了光损耗对局域化长度的影响。通过计算不同温度下的局域化长度,发现石墨烯等离子体的安德森局域化具有温度依赖性,可以通过改变温度来控制。在每个随机实现的透射谱中,存在一些随温度升高而蓝移的共振峰。最后,研究了石墨烯层的费米能级和空气隙的宽度对单个透射共振的影响。

英文摘要:

In this paper, we propose a one-dimensional disordered plasmonic structure composed of a graphene single layer placed on a random grating composed of InAs. The propagation of a plasmonic wave through this structure is investigated numerically. By calculation of normalized localization length for systems with different disorder strengths, it is determined whether or not the system is in the localized regime. For some frequencies, depending on the disorder level, Anderson localization occurs for plasmonic waves propagating through the graphene layer. Furthermore, the effect of optical loss on the localization length is studied. By calculating the localization length at different temperatures, it is observed that Anderson localization of graphene plasmons is temperature dependent and can be controlled by changing the temperature. In the transmission spectrum for each random realization, there are some resonance peaks which are blue-shifted with increasing the temperature. Finally, the effects of Fermi energy level of the graphene layer and width of air gaps on the individual transmission resonances are examined.

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。

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