Application of optical beams to electrons in graphene
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen (Belgium)
The technique of beam optics is applied to the description of the wave function of Dirac electrons. This approach is illustrated by considering electron transmission through simple nonhomogeneous structures, such as flat and bent p-n junctions and superlattices. We found that a convex p-n junction compresses the beam waist, while a concave interface widens it without loosing its focusing properties. At a flat p-n junction the waist of the transmitted Gaussian beam can be narrowed or widened, depending on the angle of incidence. A general condition is derived for the occurrence of beam collimation in a superlattice which is less stringent than previous discussed.
- OSTI ID:
- 21538193
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 11; Other Information: DOI: 10.1103/PhysRevB.83.115458; (c) 2011 American Institute of Physics; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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