Month: July 2012

By R. Stassi, A. Ridolfo, S. Savasta, R. Girlanda and O. Di Stefano is published in Eurohys. Lett. 99, 24003 (2012).

By M. Leib, F. Deppe, A. Marx, R. Gross and M. J. Hartmann is published in New J. Phys. 14, 075024 (2012).