Controlling electric field distribution by graded spherical core-shell metamaterials

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

中国物理B ›› 2010, Vol. 19 ›› Issue (10): 107802-107802.doi: 10.1088/1674-1056/19/10/107802

Controlling electric field distribution by graded spherical core-shell metamaterials

孙磊¹, 余建华², 魏恩泊³

(1)Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China; (2)Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China; Institute of Theoretical Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China; (3)Institute of Oceanology and KLOCW, Chinese Academy of Sciences, Qingdao 266071, China

收稿日期:2010-01-01 修回日期:2010-04-18 出版日期:2010-10-15 发布日期:2010-10-15
基金资助:
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.

Controlling electric field distribution by graded spherical core-shell metamaterials

Wei En-Bo(魏恩泊)^a)†, Sun Lei(孙磊)^b), and Yu Kin-Wah(余建华)^b)c)‡

^a Institute of Oceanology and KLOCW, Chinese Academy of Sciences, Qingdao 266071, China; ^b Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China; ^c Institute of Theoretical Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

Received:2010-01-01 Revised:2010-04-18 Online:2010-10-15 Published:2010-10-15
Supported by:
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.

摘要/Abstract

摘要： 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.

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.

Key words: graded metamaterial, plasmon resonance, optical electric field

中图分类号: (Optical materials)

42.70.-a

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

魏恩泊, 孙磊, 余建华. Controlling electric field distribution by graded spherical core-shell metamaterials[J]. 中国物理B, 2010, 19(10): 107802-107802.

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[J]. Chin. Phys. B, 2010, 19(10): 107802-107802.

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Controlling electric field distribution by graded spherical core-shell metamaterials

Controlling electric field distribution by graded spherical core-shell metamaterials

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