UV distributed Bragg reflectors build from porous silicon multilayers F. Morales, G. García, A. Luna, R. López, E. Rosendo, T. Díaz and H. Juárez J. Eur. Opt. Soc.-Rapid Publ., 10 (2015) 15016 Published online: 21 March 2015 DOI: 10.2971/jeos.2015.15016