Lee Jeongkug, Kim Dong-Uk, Jeon Heonsu
Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Opt Express. 2011 Sep 26;19(20):19255-64. doi: 10.1364/OE.19.019255.
We investigated semi-disordered photonic crystals (PCs), digital alloys, and made thorough comparisons with their counterparts, random alloys. A set of diamond lattice PC digital alloys operating in a microwave regime were prepared by alternately stacking two kinds of sub-PC systems composed of alumina and silica spheres of the same size. Measured transmission spectra as well as calculated band structures revealed that when the digital alloy period is short, band-gaps of the digital alloys are practically the same as those of the random alloys. This study indicates that the concept of digital alloys holds for photons in PCs as well.
我们研究了半无序光子晶体（PCs）、数字合金，并与它们的对应物——随机合金进行了全面比较。通过交替堆叠由相同尺寸的氧化铝和二氧化硅球体组成的两种子PC系统，制备了一组在微波波段工作的金刚石晶格PC数字合金。测量的透射光谱以及计算的能带结构表明，当数字合金周期较短时，数字合金的带隙实际上与随机合金的带隙相同。这项研究表明，数字合金的概念也适用于光子晶体中的光子。
