Observation of a Dirac point in microwave experiments with a photonic crystal modeling graphene
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 point...
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| Veröffentlicht in: | arXiv.org 2010-05 |
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| creator | Bittner, S Dietz, B Miski-Oglu, M P Oria Iriarte Richter, A Schaefer, F |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.1005.4506 |
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| source | arXiv.org; Free E- Journals |
| subjects | Crystal lattices Cylinders Dirac equation Fermions Graphene Microwave photonics Photonic crystals Physics - Chaotic Dynamics Physics - Mesoscale and Nanoscale Physics Reflection Relativism Relativistic effects Resistance Spectra |
| title | Observation of a Dirac point in microwave experiments with a photonic crystal modeling graphene |
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