▎ 摘　　要

We present transport measurements on a bilayer graphene sheet with a homogeneous back gate and a split top gate. The electronic transport data indicate the capability of directing electron flow through bilayer graphene nanostructures purely defined by electrostatic gating. Comparing the transconductance data recorded for different top gate geometries-continuous barrier and split gate-the observed transport features for the split gate can be attributed to the interference effects inside the narrow opening.