Diffractive optical elements utilized for efficiency enhancement of photovoltaic modules Mingareev, I. ; Berlich, R. ; Eichelkraut, T. J. ; Herfurth, H. ; Heinemann, S. ; Richardson, M. C. Abstract Publication: Optics Express Pub Date: June 2011 DOI: 10.1364/OE.19.011397 Bibcode: 2011OExpr..1911397M