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Contribution of terahertz waves to near-field radiative heat transfer between graphene-based hyperbolic metamaterials
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Hyperbolic metamaterials alternately stacked by graphene and silicon(Si) are proposed and theoretically studied to investigate the contribution of terahertz(THz) waves to near-field radiative transfer. The results show that the heat transfer coefficient can be enhanced several times in a certain THz frequency range compared with that between graphene-covered Si bulks because of the presence of a continuum of hyperbolic modes. Moreover, the radiative heat transfer can also be enhanced remarkably for the proposed structure even in the whole THz range. The hyperbolic dispersion of the graphenebased hyperbolic metamaterial can be tuned by varying the chemical potential or the thickness of Si, with the tunability of optical conductivity and the chemical potential of graphene fixed. We also demonstrate that the radiative heat transfer can be actively controlled in the THz frequency range. 相似文献
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文章详细阐述了通过设计和实施一系列测试,分析和摸索出一套改变数字集群终端GPS参数的经验,以显著提高数字集群终端GPS定位服务的精准度,最终满足大型城市数字集群终端精准位置服务的业务要求。 相似文献
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随着无线通信系统与其他系统间的融合发展,现有的运维模式已不能满足日趋庞大的运维需求。文章设计了“监、管、维”为一体的智能运维系统,对运维目标进行实时监控、多维度分析、处置管理,解决无线通信系统设备分散、故障发现延迟和故障处理效率低下的问题,提高运维效率,实现运维的自动化、智能化和高效化。 相似文献
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