Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures
ZHANG Yan, SHI Jun-Jie
State Key Laboratory for Mesoscopic Physics, and School of Physics, Peking University, Beijing 100871
Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures
ZHANG Yan;SHI Jun-Jie
State Key Laboratory for Mesoscopic Physics, and School of Physics, Peking University, Beijing 100871
关键词 ：
42.70.Qs ,
03.50.De ,
78.67.Pt
Abstract ： Light propagation in a one-dimensional photonic crystal (PC), consisting of alternative slabs with refractive indices (layer thicknesses) n1 (a) and n2 (b), is investigated. An important optimal parameter matching condition, n1 a approx n2b , is obtained for the largest photonic band gap (PBG). Moreover, we find that the exact analytical solutions for the electric/magnetic field eigenmodes at the band edges are standing waves with odd or even symmetry about the centre of each layer. The electric/magnetic field eigenfunctions at the top and bottom of the nth band have n and n-1 nodes in one period of PC, respectively. The PBG arises from the symmetric differences of the field eigenfunctions at the band edges.
Key words ：
42.70.Qs
03.50.De
78.67.Pt
出版日期: 2006-03-01
:
42.70.Qs
(Photonic bandgap materials)
03.50.De
(Classical electromagnetism, Maxwell equations)
78.67.Pt
(Multilayers; superlattices; photonic structures; metamaterials)
引用本文:
ZHANG Yan;SHI Jun-Jie. Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures[J]. 中国物理快报, 2006, 23(3): 639-642.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I3/639
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2006, Vol. 23 
