Knowledge of how energy and charge carriers move in nanoscale systems is essential for engineering efficient devices. In this Letter, we demonstrate a technique to directly image dynamics in nanostructures based on laser scanning transient absorption microscopy, which provides near diffraction-limited spatial resolution and ultrafast time resolution. The capabilities of the technique are demonstrated by experiments on propagating surface plasmon polariton modes of Au nanowires, although these measurements can be used to study a variety of fluorescent and nonfluorescent systems.
© 2013 Optical Society of America
Original Manuscript: January 11, 2013
Revised Manuscript: March 13, 2013
Manuscript Accepted: March 14, 2013
Published: April 4, 2013
Vol. 8, Iss. 5 Virtual Journal for Biomedical Optics
Shun Shang Lo, Hong Yan Shi, Libai Huang, and Gregory V. Hartland, "Imaging the extent of plasmon excitation in Au nanowires using pump-probe microscopy," Opt. Lett. 38, 1265-1267 (2013)