  We report on the efficient photodetection (PD) properties of graphene based
p-i-n photodetector, where all the three layers are either single or multilayer
graphene sheets. We report the bandwidth and responsivity performance of the
device. This simple structure paves the way for the next generation flexible
wireless communication systems. A theoretical model is used to study the
carrier distribution and current in a graphene based p-i-n photodetector
system.
