Fig. 1: Composite nanostructure and transient absorption data.
From: Optical-field driven charge-transfer modulations near composite nanostructures
a Schematic representation of the Ag-Al2O3 composite nanostructure covered by an organic dyad film with their characteristic parameters: number of pairs (p), pair thickness and periodicity (2a = 20 nm), metal volume fraction (fv = 0.5), Al2O3 top-thickness (h), distance from the Al2O3-Donor:Acceptor (D:A) molecules interface (z), and dyad-film thickness (L=40 nm). b, c Normalized relative transmittance variation for charge separation and charge recombination, respectively, as a function of the time delay with a 125-nm-thick Al2O3 composite nanostructure top-cover (inset: semi-log scale of 1+ΔT/T, and -ΔT/T, note that to illustrate the signal variation the scales in the inset are inverted), respectively. Colored lines are exponential fits. d, e Charge separation (CS) and charge recombination (CR) dynamics as a function of the thickness of the Al2O3 composite nanostructure top-cover; the horizontal straight lines correspond to the charge transfer dynamics and their uncertainties measured on reference fused silica substrates. All the measurements were completed in transmittance mode, with a 325-nm photo-excitation and a 725 nm-probe beam.
