Circularly polarized near-field optical mapping of spin-resolved quantum Hall chiral edge states.
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.
†Division of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan.
Syuhei
S
Mamyouda
†Division of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan.
Hironori
H
Ito
†Division of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan.
Yusuke
Y
Shibata
‡National Institute of Advanced Industrial Science and Technology (AIST), Umezono, Tsukuba 305-8568, Japan.
Satoshi
S
Kashiwaya
¶NTT Basic Research Laboratories, NTT Corporation, Morinosato-Wakamiya, Atsugi 243-0198, Japan.
Masumi
M
Yamaguchi
¶NTT Basic Research Laboratories, NTT Corporation, Morinosato-Wakamiya, Atsugi 243-0198, Japan.
Tatsushi
T
Akazaki
¶NTT Basic Research Laboratories, NTT Corporation, Morinosato-Wakamiya, Atsugi 243-0198, Japan.
Hiroyuki
H
Tamura
†Division of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan.
Youiti
Y
Ootuka
†Division of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan.
Shintaro
S
Nomura
D002942:Circular Dichroism / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D060526:Magnetic Fields; D008422:Materials Testing / Q000295:instrumentation*; D020527:Microscopy, Scanning Probe / Q000295:instrumentation*; D011789:Quantum Theory; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013113:Spin Labels
D013113:Spin Labels
chiral; circular polarization; edge state; nanophotonics; near-field optical microscope; quantum Hall effect; scanning probe microscopy; spin injection