Related Experiment Video
Updated: Jun 16, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
Impact of apexes on the resonance shift in double hole nanocavities
Srinivasan Iyer1, Sergei Popov, Ari T Friberg
1Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), Electrum 229, Kista, SE-164 40, Sweden. srsi@kth.se
Abstract:
The transmission of light through metallic films with periodic double nanoholes is studied using vectorial three-dimensional finite element method. Special emphasis is given on understanding different transmission resonances arising in gold and silver films with periodic sub-wavelength holes of different shapes. The spectral shift of the hole-shape resonance resulting from a variation of the hole refractive index is analyzed for a double nanohole geometry in the transmission mode using numerical simulations. Specifically, the role of field enhancement at the apexes of the double nanohole in the sensing of medium within the hole cavity is pointed out and discussed. The presence of sharp apexes within the double nanoholes significantly improves the resonance sensitivity as compared to rectangular holes of comparable area. Impact of possible manufacturing errors on the overall sensitivity is also characterized. Robustness and a relatively simple fabrication procedure make these kinds of refractive index sensors practically attractive.
Related Concept Videos
Standing Waves in a Cavity
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Sound Waves: Resonance
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
¹H NMR Signal Multiplicity: Splitting Patterns

