Wave propagation characteristics of apertures were analyzed to explain the light transmission of metallic nanoapertures. Based on Maxwell's equations, the wave dispersion relations of wave propagation modes in nanoapertures were derived. The resonance frequency shift of the aperture and the variation of the spot size are explained with the dispersion relations. The relationship between near-field and far-field light transmission power throughput and spot size is also shown with the wave mode change predicted by the dispersion relations.
Bibliographical noteFunding Information:
This research was supported by Research Funds of the National Research Laboratory Program (Project No. M10400000027–04J0000–02710) and the Nano R&D Program (Project No. M10609000019–06M0900–01910) from the Ministry of Science and Technology in Korea.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)