Effective permittivity and permeability of one-dimensional dielectric photonic crystal within a band gap  被引量:5

Effective permittivity and permeability of one-dimensional dielectric photonic crystal within a band gap

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作  者:郭继勇 陈鸿 李宏强 张冶文 

机构地区:[1]Pohl Institute of Solid State Physics,Tongji University

出  处:《Chinese Physics B》2008年第7期2544-2552,共9页中国物理B(英文版)

基  金:supported by the National Key Basic Research Special Foundation of China (Grant No 2006CB921701);the National Natural Science Foundation of China (Grant Nos 10474072,10634050 and 50477048); the Shanghai Science and Technology Committee of China (Grant No 07DZ22302)

摘  要:We take a finite dielectric photonic crystal as a homogeneous slab and have extracted the effective parameters. Our systematic study shows that the effective permittivity or permeability of dielectric photonic crystal is negative within a band gap region. This means that the band gap might act as ε-negative materials (ENMs) with ε 〈 0 and μ 〉 0, or μ-negative materials (MNMs) with ε 〉 0 and μ 〈 0. Moreover the effective parameters sensitively rely on size, surface termination, symmetry, etc. The effective parameters can be used to design full transmission tunnelling modes and amplify evanescent wave. Several cases are studied and the results show that dielectric photonic band gap can indeed mimic a single negative material (ENM or MNM) under some restrictions.We take a finite dielectric photonic crystal as a homogeneous slab and have extracted the effective parameters. Our systematic study shows that the effective permittivity or permeability of dielectric photonic crystal is negative within a band gap region. This means that the band gap might act as ε-negative materials (ENMs) with ε 〈 0 and μ 〉 0, or μ-negative materials (MNMs) with ε 〉 0 and μ 〈 0. Moreover the effective parameters sensitively rely on size, surface termination, symmetry, etc. The effective parameters can be used to design full transmission tunnelling modes and amplify evanescent wave. Several cases are studied and the results show that dielectric photonic band gap can indeed mimic a single negative material (ENM or MNM) under some restrictions.

关 键 词:photonic crystal negative permittivity negative permeability 

分 类 号:O734[理学—晶体学]

 

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