Circularly Polarized Near-Field Optical Mapping of Spin-Resolved Quantum Hall Chiral Edge States
- Syuhei Mamyouda ,
- Hironori Ito ,
- Yusuke Shibata ,
- Satoshi Kashiwaya ,
- Masumi Yamaguchi ,
- Tatsushi Akazaki ,
- Hiroyuki Tamura ,
- Youiti Ootuka , and
- Shintaro Nomura
Abstract
We have successfully developed a circularly polarized near-field scanning optical microscope (NSOM) that enables us to irradiate circularly polarized light with spatial resolution below the diffraction limit. As a demonstration, we perform real-space mapping of the quantum Hall chiral edge states near the edge of a Hall-bar structure by injecting spin polarized electrons optically at low temperature. The obtained real-space mappings show that spin-polarized electrons are injected optically to the two-dimensional electron layer. Our general method to locally inject spins using a circularly polarized NSOM should be broadly applicable to characterize a variety of nanomaterials and nanostructures.
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This article is cited by 7 publications.
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- Shintaro Nomura, Syuhei Mamyouda, Hironori Ito, Yusuke Shibata, Tomoya Ohira, Luno Yoshikawa, Youiti Ootuka, Satoshi Kashiwaya, Masumi Yamaguchi, Hiroyuki Tamura, Tatsushi Akazaki. Circularly polarized near-field scanning optical microscope for investigations of edge states of a two-dimensional electron system. Applied Physics A 2015, 121 (4) , 1341-1345. https://doi.org/10.1007/s00339-015-9420-9
- Yusuke Shibata, Shintaro Nomura, Hiromi Kashiwaya, Satoshi Kashiwaya, Ryosuke Ishiguro, Hideaki Takayanagi. Imaging of current density distributions with a Nb weak-link scanning nano-SQUID microscope. Scientific Reports 2015, 5 (1) https://doi.org/10.1038/srep15097