Comment on"Band gaps structure and semi-Dirac point of two-dimensional function photonic crystals"by Si-Qi Zhang et al

• 来源期刊: 中国物理B（英文版）
• 关键词: two-dimensional function photonic crystals photonic band gaps plane wave expansion method Monte Carlo method
• 年，卷（期）: 2018,（1）
• 页码范围: 385-389
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/1/014205

摘要

Recently, Zhang et al. (Chin. Phys. B 26024208 (2017)) investigated the band gap structures and semi-Dirac point of two-dimensional function photonic crystals, and the equations for the plane wave expansion method were induced to obtain the band structures. That report shows the band diagrams with the effects of function coefficient k and medium column ra under TE and TM waves. The proposed results look correct at first glance, but the authors made some mistakes in their report. Thus, the calculated results in their paper are incorrect. According to our calculations, the errors in their report are corrected, and the correct band structures also are presented in this paper.