Efficient and stable holographic gratings stored in an environmentally friendly photopolymer

This work was supported by the “Ministerio de Ciencia, Innovacion y Universidades” (Spain) under projects FIS2017-82919-R (MINECO/AE/FEDER, UE) and FIS2015-66570-P (MINECO/FEDER) ang by the University of Alicante under project GRE17-06. M.M-V. acknowledge the financial support by the "Generalitat Valenciana” (Spain) under grant CDEIGENT/2018/024.