▎ 摘　　要

An ultralow power polarization-insensitive metamaterial-induced transparency with ultrafast all-optical control is realized by adopting gold nanoprism trimers as the meta-molecules and using multilayer graphene microsheet/polycrystalline indium-tin oxide composite as the nonlinear medium. Compared with previous reports, the threshold pump intensity is reduced by six orders of magnitude, while an ultrafast response time of picoseconds order is maintained.