Two-dimensional ring-type photonic crystals in the near-infrared region

• 来源期刊: 中国物理（英文版）
• 关键词: ring photonic crystals direction-independent complete band gap
• 年，卷（期）: 2004,（9）
• 页码范围: 1474-1476
• 页数: 3页
• 语种: 英文

摘要

We propose a ring photonic crystal working in the near infrared region, where the air holes in the background material GaAs are arranged to form a series of rings. We find that the band gaps do not depend on the incident direction,and only a small number of rows are needed to create a frequency gap in the transmission spectrum. The transmission spectra of both P and S polarizations show that there is a complete bandgap in the hexagonal ring photonic crystals and the ratio of gap width to mid-gap frequency is as high as 11%.