混合Faraday-Voigt组态中的强方向依赖磁等离子体
Strongly direction-dependent magnetoplasmons in mixed Faraday-Voigt configurations
摘要：
将半无限磁化电子气中磁等离子体的静电理论推广到混合Faraday-Voigt组态。我们分析了一种新型的静电表面波，这是强烈的方向依赖性，并可能实现窄间隙半导体在太赫兹制度。色散关系的一般表达式，其依赖于所施加的磁场的大小和方向。值得注意的是，群速度总是垂直于相速度。详细讨论了所发现的磁等离激元的速度和能量关系。在适当的限制，已知的磁等离子体在较高的对称性法拉第和Voigt配置恢复。
英文摘要：
The electrostatic theory of magnetoplasmons on a semi-infinite magnetized electron gas is generalized to mixed Faraday-Voigt configurations. We analyze a new type of electrostatic surface waves that is strongly direction-dependent, and may be realized on narrow-gap semiconductors in the THz regime. A general expression for the dispersion relation is presented, with its dependence on the magnitude and orientation of the applied magnetic field. Remarkably, the group velocity is always perpendicular to the phase velocity. Both velocity and energy relations of the found magnetoplasmons are discussed in detail. In the appropriate limits the known magnetoplasmons in the higher-symmetry Faraday and Voigt configurations are recovered.
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