波导干涉仪中的模式过滤电子注入
Mode-filtered electron injection into a waveguide interferometer
摘要：
研究了模式过滤电子注入相敏四端波导Aharonov-Bohm（AB）环的情况。GaAs/AlGaAs环的波导引线中的可单独调谐的量子点接触（QPC）允许选择性地耦合到环中的一维模式。因此，我们证明了单模传输的多模波导结构。相干模式过滤的最低QPC子带的非本地弯曲电阻和相敏AB干涉测量验证。
英文摘要：
Injection of mode-filtered electrons into a phase-sensitive four-terminal waveguide Aharonov-Bohm (AB) ring is studied. An individually tuneable quantum point contact (QPC) in a waveguide lead of the GaAs/AlGaAs-ring allows to selectively couple to one-dimensional modes in the ring. Thus, we demonstrate single-mode transport in a multi-mode waveguide structure. Coherent mode-filtering by the lowest QPC subband is verified by non-local bend resistance and phase-sensitive AB interference measurements.
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