Figure 2: The mechanism and measurement of Fano resonances in different capped aluminum nanoslit arrays.
From: Highly Sensitive Aluminum-Based Biosensors using Tailorable Fano Resonances in Capped Nanostructures
(a) A schematic configuration, depicting the geometrical parameters of the capped nanoslits with various ridge heights (H = 60–75 nm) and aluminum film thicknesses (T = 22–81 nm). (b) The measured transmission spectra of these capped aluminum nanoslits for TM-polarized incident light. The open circles show the Fano fittings for different nanostructures. The Fano factors are −9.2 × 1021, −1.31 and −0.12, respectively. (c) A schematic illustration demonstrates the Fano resonances with different Fano factors in these nanostructures. (d) The resonance field (Ex) distribution at the resonance peak for 20-nm-thick capped aluminum nanoslits. (e) The Ex field distribution at Fano resonance dip for 60-nm-thick capped aluminum nanoslits.
