论文标题
通过粘贴匹配与暗模式来增强光学纳米腔偶联
Boosting Optical Nanocavity Coupling by Retardation Matching to Dark Modes
论文作者
论文摘要
等离子体纳米 - 安南纳斯可以将光聚焦到纳米长度尺度，从而提供强烈的场所增强。对于在等离子间隙中达到的最紧密的光限制（0.5-5 nm），间隙间距，折射率和刻面宽度在确定光学特性方面起着主导作用，从而使通过天线形状调整调音挑战性的光学特性。我们在这里表明，控制周围的折射率相反，通过延迟匹配可以有效地调整和增强/输出耦合，因为这允许黑暗模式具有光学活跃，从而提高了广泛的功能。
Plasmonic nano-antennas can focus light to nanometre length-scales providing intense field enhancements. For the tightest optical confinements (0.5-5 nm) achieved in plasmonic gaps, the gap spacing, refractive index, and facet width play a dominant role in determining the optical properties making tuning through antenna shape challenging. We show here that controlling the surrounding refractive index instead allows both efficient frequency tuning and enhanced in/output-coupling through retardation matching as this allows dark modes to become optically active, improving widespread functionalities.
