Answers are grounded in this paper and cite their sources.
To achieve non-resonant behavior, we propose a metallic grating device with linearly tapered slits. The tapering provides a gradual impedance variation from the entrance to the exit of the slits, leading to broadband and wide-angle enhanced transmission in the infrared. In addition, the light is strongly localized and enhanced at the slit exits, in contrast with straight slits. We describe the phenomenon with a transmission line model, which is in accordance with rigorous simulations.
No takes yet. Share an insight, caveat, or question.
Shen et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: