Direct observation of excitonic polaron in InAs/GaAs quantum dots Ming Gong, Geng Chen, Lixin He, Chuan-Feng Li, Jian-Shun Tang, Fang-Wen Sun, Zhi-Chuan Niu, She-Song Huang, Yong-Hua Xiong, Hai-Qiao Ni and Guang-Can Guo EPL, 90 3 (2010) 37004 Published online: 01 June 2010 DOI: 10.1209/0295-5075/90/37004