Generation of polarization vortex beams by segmented quarter-wave plates Jingtao Xin, Jingtao Xin ; Xiaoping Lou, Xiaoping Lou ; Zhehai Zhou, Zhehai Zhou ; Mingli Dong, Mingli Dong ; Lianqing Zhu ; Lianqing Zhu Abstract Publication: Chinese Optics Letters Pub Date: 2016 DOI: 10.3788/COL201614.070501 Bibcode: 2016ChOpL..14g0501J