Fluctuations of the electromagnetic local density of states as a probe for structural phase switching

This research was supported by the Spanish Ministry of Economy and Competitiveness through Grants No. FIS2012- 36113-C03, No. FIS2015-69295-C3-3-P, and No. MAT2014- 58860-P, and by the Comunidad de Madrid (Contract No. S2013/MIT-2740). F.S. and L.S.F.-P. acknowledge funding from the Swiss National Science Foundation through the National Centre of Competence in Research Bio-Inspired Materials.