Dynamics of the fractional quantum Hall edge probed by stroboscope measurements of trions

By using observations from pump-probe stroboscopic confocal microscopy and spectroscopy, we demonstrate the dynamics of trions and the fractional quantum Hall edge on the order of ∼ 1 ps. The propagation of the quantum Hall edge state excited by a voltage pulse is detected as a temporal change in re...

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Bibliographic Details
Published in:Applied physics letters 2023-05, Vol.122 (20)
Main Authors: Kamiyama, Akinori, Matsuura, Masahiro, Moore, John N., Mano, Takaaki, Shibata, Naokazu, Yusa, Go
Format: Article
Language:English
Subjects:
Applied physics
Black holes
Charge density waves
Electric potential
Electrons
Excitation
Optical pulses
Quantum Hall effect
Temporal resolution
Tensors
Trions
Voltage
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Summary:By using observations from pump-probe stroboscopic confocal microscopy and spectroscopy, we demonstrate the dynamics of trions and the fractional quantum Hall edge on the order of ∼ 1 ps. The propagation of the quantum Hall edge state excited by a voltage pulse is detected as a temporal change in reflectance in the downstream edge probed by optical pulses synchronized with the voltage pulse. The temporal resolution of such stroboscopic pump-probe measurements is as fast as the duration time of the probe pulse ( ∼ 1 ps). This ultra-fast stroboscope measurement enables us to distinguish between the normal mode of edge excitation, known as the edge magneto-plasmon or charge density wave, and other high-energy non-linear excitations. This is the only experimental method available to study the ultra-fast dynamics of quantum Hall edges and makes it possible to derive the metric tensor g μ ν of the ( 1 + 1 ) = 2-dimensional curved spacetime in quantum universe and black hole analogs implemented in the quantum Hall edge.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0138332