Terahertz magnetoplasmon resonances in coupled cavities formed in a gated two-dimensional electron gas.
Terahertz magnetoplasmon resonances in coupled cavities formed in a gated two-dimensional electron gas.
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DOI：
10.1364/oe.414178
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发表时间：
2021-03
期刊：
影响因子：
3.8
通讯作者：
SaeJune Park;Simone Zonetti;R. Parker-Jervis;Jingbo Wu;Christopher D. Wood;Lianhe H. Li;Giles Davies;E. Linfield;O. Sydoruk;John P. Cunningham
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文献类型：
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作者：
SaeJune Park;Simone Zonetti;R. Parker-Jervis;Jingbo Wu;Christopher D. Wood;Lianhe H. Li;Giles Davies;E. Linfield;O. Sydoruk;John P. Cunningham
我们报道了低太赫兹频率范围(高达400 GHz)磁等离子体在低温(1t；4K)门控二维电子气中的实验和理论。在频率高达∼400Ghz的磁场作用下，观察到了磁等离激元共振的演化。系统的全波三维模拟预测了2D通道中等离子体激元模式的空间分布及其频率响应，使我们能够区分实验中由体磁等离子体和边缘磁等离子体引起的共振。我们的方法有望应用于其他低维介观系统的低温(<；4K)片上太赫兹测量。
We report on both experiments and theory of low-terahertz frequency range (up to 400 GHz) magnetoplasmons in a gated two-dimensional electron gas at low (<4K) temperatures. The evolution of magnetoplasmon resonances was observed as a function of magnetic field at frequencies up to ∼400 GHz. Full-wave 3D simulations of the system predicted the spatial distribution of plasmon modes in the 2D channel, along with their frequency response, allowing us to distinguish those resonances caused by bulk and edge magnetoplasmons in the experiments. Our methodology is anticipated to be applicable to the low temperature (<4K) on-chip terahertz measurements of a wide range of other low-dimensional mesoscopic systems.