Figure 3: Refractive index sensing capabilities of the capped aluminum nanoslits.
From: Highly Sensitive Aluminum-Based Biosensors using Tailorable Fano Resonances in Capped Nanostructures
(a) The transmission spectra of the capped aluminum nanoslits with various water/glycerin mixtures for a normally-incident TM-polarized wave. The structure parameters are H = 60 nm, T = 42 nm, W = 60 nm, and P = 470 nm. (b) The peak wavelength and dip wavelength against the refractive index of outside medium. The slopes of the fitting curves show that the bulk sensitivities were 464 and 473 nm/RIU for the resonance peak and dip, respectively. (c) The normalized intensity change against the refractive index of the outside medium. The slope of the fitting curve shows that the intensity sensitivity was 29,345%/RIU. (d) The intensity change as a function of time at a wavelength of 630.75 nm. (e) The transmission spectra of the capped aluminum nanoslits with various water/glycerin mixtures for a normally-incident TM-polarized wave. The structure parameters are H = 35 nm, T = 42 nm, W = 60 nm, and P = 470 nm. (f) The peak wavelength and dip wavelength against the refractive index of outside medium for the nanostructure with a ridge height of 35 nm. The peak and dip wavelength sensitivities were 467 and 471 nm/RIU, respectively.
