Man-Nung Su

TL;DR: The implementation of single-particle absorption spectroscopy on strongly scattering plasmonic nanoparticles is demonstrated by combining photothermal microscopy with a supercontinuum laser and an innovative calibration procedure that accounts for chromatic aberrations and wavelength-dependent excitation powers.

TL;DR: The results show that the adhesion layer can be used to controllably modify the acoustic phonon modes of a gold nanodisk, and this direct coupling between optically excited plasmon modes and phonon mode can be exploited for a variety of emerging optomechanical applications.

TL;DR: This work investigates the relaxation following ultrafast pulsed excitation and the launching of acoustic vibrations in individual aluminum nanodisks, using single-particle transient extinction spectroscopy and finds that the transient extinction signal can be assigned to a thermal relaxation of the photoexcited electrons and phonons.

TL;DR: Evidence of vibrational coupling between the constituent atoms in a plasmonic molecule mediated by coherent substrate phonons is provided, providing a route to the systematic optical control of the gigahertz response of metallic nanostructures, opening the door to new optomechanical device strategies.

TL;DR: This work combines single-particle transient extinction spectroscopy and parameter-free first-principles calculations to investigate the non-equilibrium carrier dynamics in aluminum nanostructures and finds the sub-picosecond optical response of lithographically fabricated aluminum nanodisks to be more sensitive to the lattice temperature than the electron temperature.