Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1539343 | Optics Communications | 2009 | 4 Pages |
Abstract
The local electric field of a graded metal-dielectric cylinder, with complex permittivity given by a spatially dependent Drude model, has been derived analytically in terms of hypergeometric functions. Our results show that the electric field inside the cylinder can be confined in desired positions. Thus one can achieve the control of electric fields by fabricating graded metamaterials with specific material parameters. The enhanced nonlinear optical responses are also examined. The results suggest that the gradation-controlled field distribution may be a consequence of a combination of surface plasmon resonance and microgeometry in graded metamaterials.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
T.H. Fung, L.L. Leung, J.J. Xiao, K.W. Yu,