Dirac cones, named after the renowned physicist Paul Dirac, are unique features found in the electronic band structures of certain materials, such as graphene and topological insulators. These cones ...

In a medium with a refractive index of zero n = 0, the effective wavelength becomes infinite, λ = 2πc/ωn→∞, and the spatial phase distribution of a propagating wave becomes uniform over the entire ...

Diffraction is a natural property of light beams. It allows light to bend around obstacles. Because light serves as a carrier of information, some of the distorting effects of diffraction must be ...

At the heart of Dirac materials' unique properties is the Dirac cone, a linear dispersion of the electronic band structure near the Fermi level. This feature results in electrons moving through the ...