http://prl.aps.org/abstract/PRL/v105/i13/e133002
which directly measures tunneling in a strong field.
I may also speak about:
http://www.nature.com/nphys/journal/v4/n7/full/nphys982.html
which claims to have measured tunneling time
I will speak about that and offer a `tutorial' of sorts on tunneling
covering the main features of tunneling and the basic theories behind
that and the 3-step model.
It will be a discussion of the paper coupled with a short lesson on the
stuff that I am most often asked about by dirty experimentalists.
If there are specific things people want to know send Ryan an email.