介电常数对比度对光子晶体平带的影响
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O436.1

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国家自然科学基金


The effect of dielectric constant contrast on the flat band of photonic crystal
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    摘要:

    光子晶体是由不同介电常数材料构成的具有周期性空间排布的人工微结构。周期性调制的介电常数使得光子晶体呈现出各种各样的能带结构,其中平带因其无色散的特性引起了人们极大的关注。为了研究影响光子晶体平带的影响因素,以二维正方格子介质柱光子晶体为例,通过有限元方法,从数值上系统研究了构成光子晶体单元的两者材料的不同介电常数比值对光子晶体能带平整性的影响。研究结果表明,通过降低介质柱周围的介电常数也可以获得较好的平带,从而为获得和进一步研究光子晶体近平带提供新的方法。

    Abstract:

    The photonic crystal is an artificial microstructure, which is composed of different dielectric constant materials periodically arranged. Periodically modulated dielectric constant makes photonic crystal show various band structures. Among them, the flat band of photonic crystal has attracted great attention due to its non-dispersive property. Here, taking the two-dimensional square lattice dielectric column photonic crystal as an example, the influence factor of dielectric constant ratio on flat band is numerically explored using the finite element method. These results show that flat band with better flatness can be also obtained by reducing the dielectric constant around the column, which provide a new approach to obtain and further study the nearly flat bands of photonic crystal.

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张婷,康明. 介电常数对比度对光子晶体平带的影响[J]. 科学技术与工程, 2021, 21(2): 442-446.
Zhang Ting, Kang Ming. The effect of dielectric constant contrast on the flat band of photonic crystal[J]. Science Technology and Engineering,2021,21(2):442-446.

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  • 收稿日期:2020-04-16
  • 最后修改日期:2020-10-13
  • 录用日期:2020-07-04
  • 在线发布日期: 2021-02-07
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