Nature Photonics
A look under the tunnelling barrier via attosecond-gated interferometry
Omer Kneller, Doron Azoury, Yotam Federman, Michael B. Kruger, Ayelet J. Uzan, Gal Orenstein, Barry D. Bruner, Olga V. Smirnova, Serguei Patchkovskii, Misha Ivanov, Nirit Dudovich