Tomographic reconstruction of picosecond acoustic strain propagation

Abstract

By means of an ultrafast optical technique, picosecond acoustic strain pulses in a transparent medium are tomographically visualized. The authors reconstruct strain pulses in Au-coated glass from time-domain reflectivity changes as a function of the optical angle of incidence, with ∼1 ps temporal and ∼100 nm spatial resolutions. © 2007 American Institute of Physics.