Highly efficient narrow-band plasmonic waveguide filter based on cascaded slot cavities

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（11）
• 页码范围: 83-86
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.112401.

摘要

A novel plasmonic waveguide filter design based on three cascaded slot cavities is proposed.The cascaded nanocavities support a united resonant (UR) mode.Light is trapped in the middle nanocavity at telecommunication wavelength (1550 nm) when the UR mode exists.This phenomenon leads to the efficient transmittance and high Q factor of the plasmonic filter.The resonant wavelength and Q factor can be easily modulated by the cavity radii and the waveguide width.