Sub-cycle switching of a photonic bandstructure via ultrastrong light-matter couplingJ.–M. Ménard, M. Porer, A. Leitenstorfer, R. Huber, R. Degl'Innocenti, S. Zanotto, G. Biasiol, L. Sorba and A. TredicucciEPJ Web of Conferences, 41 (2013) 09009DOI: https://doi.org/10.1051/epjconf/20134109009