Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum rings Weiwei Zhang, Zhiqiang Su, Ming Gong, Chuan-Feng Li, Guang-Can Guo and Lixin He EPL, 83 6 (2008) 67004 Published online: 08 September 2008 DOI: 10.1209/0295-5075/83/67004