Plasmon-induced transparency in graphene-based terahertz metamaterials Koijam Monika Devi, Maidul Islam, Dibakar Roy Chowdhury, Amarendra K. Sarma and Gagan Kumar EPL, 120 2 (2017) 27005 Published online: 15 January 2018 DOI: 10.1209/0295-5075/120/27005