论文标题
基于磁性质量石墨烯纳米风克的可调THZ开关过滤器
Tunable THz Switch-Filter Based on Magneto-Plasmonic Graphene Nanodisk
论文作者
论文摘要
我们建议和分析一个可以用作可调开关和过滤器的多功能THZ设备。该设备由一个圆形石墨烯纳米磁管组成，该纳米磁管耦合到两个以$ 90^\ circ $为方面的纳米管，相互互相互动。石墨烯元素放置在介电底物上。通过与其平面正常的直流磁场磁化。该设备的物理原理是基于石墨烯纳米容器中表面等离子体 - 果龙波的繁殖和纳米台面中偶极模式的激发。数值模拟表明，0.61T DC磁场在频率5.33 THz的带宽12.7 $ \％$下提供传输（ONCIME ON），并使用Q-因子等于7.8。在中央频率下，插入损失约为-2 dB，反射系数为-43 dB。可以通过将直流磁场转换为零值或通过将纳米风险的化学电位切换到零，而ON/OFF比率优于20 dB来实现该政权的关闭。通过固定的直流磁场，可以通过化学电位进行小的中央频率调整。
We propose and analyze a multifunctional THz device which can operate as a tunable switch and a filter. The device consists of a circular graphene nanodisk coupled to two nanoribbons oriented at $90^\circ$ to each other. The graphene elements are placed on a dielectric substrate. The nanodisk is magnetized by a DC magnetic field normal to its plane. The physical principle of the device is based on the propagation of surface plasmon-polariton waves in the graphene nanoribbons and excitation of dipole modes in the nanodisk. Numerical simulations show that 0.61T DC magnetic field provides transmission (regime ON) at the frequency 5.33 THz with the bandwidth 12.7$\%$ and filtering with the Q-factor equals to 7.8. At the central frequency, the insertion loss is around -2 dB and the reflection coefficient is -43 dB. The regime OFF can be achieved by means of switching DC magnetic field to zero value or by switching chemical potential of the nanodisk to zero with the ON/OFF ratio better than 20 dB. A small central frequency tuning by chemical potential is possible with a fixed DC magnetic field.
