Observation of a Dirac point in microwave experiments with a photonic crystal modeling graphene

Details Observation of a Dirac point in microwave experiments with a photonic crystal modeling graphene Observation of a Dirac point in microwave experiments with a photonic crystal modeling graphene

2010-05-25

arxiv.org/abs/1005.4506v1

Phys. Rev. B 82, 014301 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.82.014301

We present measurements of transmission and reflection spectra of a microwave photonic crystal composed of 874 metallic cylinders arranged in a triangular lattice. The spectra show clear evidence of a Dirac point, a characteristic of a spectrum of relativistic massless fermions. In fact, Dirac points are a peculiar property of the electronic band structure of graphene, whose properties consequently can be described by the relativistic Dirac equation. In the vicinity of the Dirac point, the measured reflection spectra resemble those obtained by conductance measurements in scanning tunneling microscopy of graphene flakes.

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