Low-Threshold Surface Plasmon Lasing using the Band Edge Mode in a Bi-Periodic Groove Array

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（8）
• 页码范围: 185-189
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/8/087805

摘要

We study surface plasmon lasing based on periodic and bi-periodic groove arrays etched on a silver substrate.It is interesting to find that the bi-periodic structure can open a clear band gap of surface plasmon polaritons near the first Brillouin zone boundary,and thus it is promising to utilize the band edge modes of surface plasmon polaritons.A low threshold for the surface plasmon lasing effect is demonstrated numerically,owing to the low group velocity of the band edge mode,which provides a feasible way to design surface plasmon lasers.