Thin-film Pancharatnam lens with low f-number and high quality Gao, Kun ; Cheng, Hsien-Hui ; Bhowmik, Achintya K. ; Bos, Philip J. Abstract Publication: Optics Express Pub Date: October 2015 DOI: 10.1364/OE.23.026086 Bibcode: 2015OExpr..2326086G