Figure 5: Transient absorbance spectroscopy of the plasmonic-ferroelectric hybrids. | Nature Communications

Figure 5: Transient absorbance spectroscopy of the plasmonic-ferroelectric hybrids.

From: Manipulation of charge transfer and transport in plasmonic-ferroelectric hybrids for photoelectrochemical applications

Figure 5

Photoinduced transmission, ΔT/T(hν,t) spectra recorded on (a) ITO/nano-Au, (b) ITO/nano-Au/PZT and (c) ITO/PZT/nano-Au/PZT, following photoexcitation with 70 fs ultraviolet pulses at 400 nm. (d) The time evolution ΔT/T(hν,t) in ITO/nano-Au that can be reproduced by ΔT/T(hν,t)=ΔT/T(1.3 eV<hν<2 eV) × S1.3 eV<hν<2eV(t)+ΔT/T(2 eV<hν<2.8 eV) × S2 eV<hν<2.8 eV(t). The time evolutions, S(t), are shown in the main panel, while their respective spectra are shown in inset. The dotted line presents the time evolution of the low-frequency range (1.3 eV<hν<2 eV), while the solid line corresponds to the high frequency (2 eV<hν<2.8 eV). Comparison of the low-frequency (e) and high-frequency (f) dynamics between the three nano-Au hybrids. The high-frequency response demonstrates the speeding up of relaxation in nano-Au/PZT hybrids, consistent with the existence of an additional relaxation channel (Au-PZT charge transfer).

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