Encapsulation narrows excitonic homogeneous linewidth of exfoliated MoSe2 monolayer W. Martin Eric, Jason Horng, G. Ruth Hanna, Eunice Paik, Michael-Henr Wentzel, Hui Deng and T. Cundiff Steven EPJ Web Conf., 205 (2019) 06021 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920506021