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Updated: May 11, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Quantum Faraday and Kerr rotations in graphene.

R Shimano¹, G Yumoto, J Y Yoo

¹Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan. shimano@phys.s.u-tokyo.ac.jp

Nature Communications

|May 16, 2013

Summary

Graphene

Area of Science:

Condensed matter physics
Materials science
Quantum optics

Background:

Graphene's unique electronic properties stem from massless Dirac electrons.
The half-integer quantum Hall effect indicates Dirac cones and a topological Berry's phase.
Investigating the impact of these Dirac electron features on optical properties is crucial.

Purpose of the Study:

To explore quantum magneto-optical effects in graphene within the terahertz frequency range.
To correlate optical responses with the electronic properties of Dirac electrons.

Main Methods:

Observation of quantum magneto-optical Faraday and Kerr effects in graphene.
Measurement of rotations in the terahertz frequency range.
Analysis of quantum Hall plateaus in optical measurements.

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Published on: July 24, 2015

Main Results:

Quantum plateaus were observed in Faraday and Kerr rotations.
These plateaus precisely align with quantum Hall steps characteristic of Dirac electrons.
The rotation angle was found to be defined by the fine-structure constant.

Conclusions:

The study confirms robust quantum Hall plateaus in graphene's optical regime.
These findings highlight the interplay between electronic and optical properties in graphene.
Potential applications in graphene-based optoelectronics are suggested.