Abstract

Laser-triggered nanoscale electron emitters should be ideal electron sources for applications such as ultrafast electron diffraction or electron accelerators. Furthermore, they give insight into fundamental questions of light-matter interaction and ultrafast electron dynamics in nanostructures. Recently, a variety of experiments has been done in this field [1]. Here we present recent measurements that enable us to, for the first time, uniquely identify strong-field effects that are clearly resolved in the spectra of emitted electrons [2]. The observation of these effects shows that such a system may be ideal to extend strong-field studies from atomic gases to solid state systems.

© 2011 IEEE