Controlling electric field distribution by graded spherical core-shell metamaterials

doi:10.1088/1674-1056/19/10/107802

Abstract This paper investigates analytically the electric field distribution of graded spherical core-shell metamaterials, whose permittivity is given by the graded Drude model. Under the illumination of a uniform incident optical field, the obtained results show that the electrical field distribution in the shell region is controllable and the electric field peak's position inside the spherical shell can be confined in a desired position by varying the frequency of the optical field as well as the parameters of the graded dielectric profiles. It has also offered an intuitive explanation for controlling the local electric field by graded metamaterials.

Keywords: graded metamaterial plasmon resonance optical electric field

Received: 01 January 2010
Revised: 18 April 2010
Accepted manuscript online:

PACS:	42.70.-a	(Optical materials)
	77.22.Ch	(Permittivity (dielectric function))
	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

Fund: Project supported by the National 863 Project of China (Grant Nos. 2009AA09Z102 and 2008AA09A403) and the RGC General Research Fund of the Hong Kong SAR Government.

Cite this article:

Wei En-Bo(魏恩泊), Sun Lei(孙磊), and Yu Kin-Wah(余建华) Controlling electric field distribution by graded spherical core-shell metamaterials 2010 Chin. Phys. B 19 107802

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