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Dynamic control of coherent pulses via destructive interference in graphene under Landau quantization

机译:Landau量化下石墨烯破坏性干扰的动态控制

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摘要

Abstract We analyze the destructive interference in monolayer graphene under Landau quantization in a time-dependent way by using the Bloch-Maxwell formalism. Based on this analysis, we investigate the dynamics control of an infrared probe and a terahertz (THz) switch pulses in graphene. In presence of the THz switch pulse, the destructive interference take places and can be optimized so that the monolayer graphene is completely transparent to the infrared probe pulse. In absence of the THz switch pulse, however, the infrared probe pulse is absorbed due to such a interference does not take place. Furthermore, we provide a clear physics insight of this destructive interference by using the classical dressed-state theory. Conversely, the present model may be rendered either absorbing or transparent to the THz switch pulse. By choosing appropriate wave form of the probe and switch pulses, we show that both infrared probe and THz switch pulses exhibit the steplike transitions between absorption and transparency. Such steplike transitions can be used to devise a versatile quantum interference-based solid-state optical switching with distinct wave-lengths for optical communication devices.
机译:摘要通过使用Bloch-Maxwell形式主义,通过时间依赖方式分析Monolayer Graphene的破坏性干扰。基于该分析,我们研究了石墨烯中红外探头和太赫兹(THz)开关脉冲的动力学控制。在THz开关脉冲的情况下,破坏性干扰采取的地方,并且可以优化,使得单层石墨烯对红外探针脉冲完全透明。然而,在没有THz开关脉冲的情况下,由于这种干涉而被吸收红外探针脉冲。此外,我们通过使用经典的穿衣状态理论,提供了对这种破坏性干扰的清晰物理洞察力。相反,本模型可以呈现吸收或透明于THz开关脉冲。通过选择探针和开关脉冲的合适波形,我们表明,红外探头和THz开关脉冲都表现出吸收和透明度之间的温度镜转换。这种载体转换可用于设计具有用于光通信设备的不同波长的多功能量子干扰的固态光学切换。

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