Ilic, Ognjen
Bermel, Peter http://orcid.org/0000-0001-7140-0667
Chen, Gang http://orcid.org/0000-0002-3968-8530
Joannopoulos, John D.
Celanovic, Ivan
Soljačić, Marin
Article History
Received: 24 July 2015
Accepted: 25 November 2015
First Online: 11 January 2016
Competing interests
: The authors declare no competing financial interests.