Bowtie-shaped nanoaperture: a modal study - Archive ouverte HAL Access content directly
Journal Articles Optics Letters Year : 2010

Bowtie-shaped nanoaperture: a modal study

Abstract

Using the N-order finite-difference time-domain (FDTD) method, we show that optical resonances of the bowtie nanoaperture (BNA) are due to the combination of a guided mode inside the aperture and Fabry–Perot modes along the metal thickness. The resonance of lower energy, which leads to the well-known light confinement in the gap zone, occurs at the cutoff wavelength of the fundamental guided mode. No plasmon resonance is directly involved in the generation of the light hot spot. We also define a straightforward relationship between the resonance wavelengths of the BNA and its geometrical parameters. This brings a simple tool for the optimization of the BNA design.
Fichier principal
Vignette du fichier
Ibrahim2010.pdf (199.98 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-00517018 , version 1 (18-04-2021)

Licence

Identifiers

Cite

I. Abdoulkader Ibrahim, Mathieu Mivelle Mivelle, T. Grosjean, J.-T. Allegre, G.W. Burr, et al.. Bowtie-shaped nanoaperture: a modal study. Optics Letters, 2010, 35 (14), pp.2448-2450. ⟨10.1364/OL.35.002448⟩. ⟨hal-00517018⟩
123 View
68 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More