Ultrafast Dynamics of Colloidal Copper Nanorods: Intraband versus Interband Excitation.

ABSTRACT: Colloidal copper nanorods (NRs) display transverse and longitudinal localized surface plasmon resonances. The longitudinal localized surface plasmon modes are tunable through the near-infrared electromagnetic radiation energies with NR aspect ratios. Visible and near-infrared transient optical response of the copper NRs is investigated under excitation conditions spanning intraband and interband excitation (0.79-3.50 eV). In both the visible and near-infrared regions, the spectral response of the samples under intraband excitation (<2 eV) differs substantially from their response under interband excitation (>2 eV). However, the timescale of the electron-phonon coupling estimated from pump fluence-dependent measurements (τ _ep) is less sensitive to excitation conditions tha

SUBMITTER: Diroll BT 

PROVIDER: S-EPMC11935956 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature