Gao, T.
Estrecho, E.
Bliokh, K. Y.
Liew, T. C. H.
Fraser, M. D.
Brodbeck, S.
Kamp, M.
Schneider, C.
Höfling, S.
Yamamoto, Y.
Nori, F.
Kivshar, Y. S.
Truscott, A. G.
Dall, R. G.
Ostrovskaya, E. A.
Article History
Received: 4 April 2015
Accepted: 18 August 2015
First Online: 12 October 2015
Competing interests
: The authors declare no competing financial interests.