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Circular dichroism of graphene-based absorber in static magnetic field.
- Source :
-
Journal of Applied Physics . 2014, Vol. 115 Issue 15, p154312-1-154312-4. 4p. 1 Diagram, 3 Graphs. - Publication Year :
- 2014
-
Abstract
- Recently, the graphene-based absorber captures much attention due to its bright potential. In this paper, a modeling study of graphene-based absorber is made for variable magnetostatic bias, i.e., the magnetic circular dichroism (MCD). A strong MCD signal about ΔA=0.94 is obtained in 7 T for a uniform graphene-based absorber. By periodically patterning subwavelength holes on the graphene, the structured absorber exhibits two obvious peaks induced by cavity resonance and localized resonance of meta-surface in 0 T, respectively. As the magnetic field increases, the absorption peaks show quite different electromagnetic response for the two kinds of circularly polarized lights. Two distinct MCDs signals of 0.711 at 2.02 THz and 0.91 at 2.49 THz in 7 T are observed. The results are well explained by a modified equivalent circuit model. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETIC circular dichroism
*MAGNETIC fields
*GRAPHENE
*FULLERENES
*RESONANCE
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 115
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 95692400
- Full Text :
- https://doi.org/10.1063/1.4871674