Guided Modes in a Two-Dimensional Photonic Crystal Waveguide Consisting of Nearly-Free-Electron Metals

• 来源期刊: 中国物理快报
• 学科: 物理学
• 年，卷（期）: 2001,（10）
• 所属期刊栏目: FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLI
• 页码范围: 1363-1365
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

Guided modes in a two-dimensional photonic crystal consisting of nearly-free-electron metals are considered. To avoid time-consuming convolution, modified time-stepping formulae are used in a finite-difference time-domain approach. The guided modes in the metallic photonic crystal waveguide are related to those in a conventional metallic waveguide. A cut-off frequency exists, and consequently a mode gap at low frequencies exists in the photonic crystal metallic waveguide.