The Last Step in Converting the Surface Plasmonic Energy into Heat by Nanocages and Nanocubes on Substrates

The ultrafast coherent excitation and decay of localized surface plasmons are used to record the coherent oscillations of the medium surrounding nanoparticles resulting from phonon–phonon relaxation processes. The plasmonic nanoparticles used in this study are Ag nanocubes and Au nanocages deposited in a Langmuir–Blodgett monolayer. Using two sub-picosecond laser pulses, low-frequency oscillations resulting from the nanoparticle–substrate coupling are observed. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.