Mode-filtered electron injection into a waveguide interferometer

Mode-filtered electron injection into a waveguide interferometer
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模式滤波电子注入波导干涉仪

DOI:
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发表时间:
2010
期刊:
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通讯作者:
A. Wieck
A. Wieck
中科院分区:
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文献类型:
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作者:
Sven S. Buchholz;U. Kunze;S. F. Fischer;D. Reuter;A. Wieck

文献摘要

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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在多模波导结构。通过非局域弯曲电阻和相敏AB干涉测量验证了最低QPC子带的相干模式滤波。
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 multimode waveguide structure. Coherent mode-filtering by the lowest QPC subband is verified by nonlocal bend resistance and phase-sensitive AB interference measurements.