@article {65215,
	title = {Performance analysis of a new graphene based-phototransistor for ultra-sensitive infrared sensing applications, ISSN 0030-4026},
	journal = {OptikOptik},
	volume = {Volume 176},
	year = {2018},
	month = {2018},
	pages = {pp. 24-31},
	abstract = {In this paper, a new Graphene nanoribbon (GNR) based\&nbsp;Ge-phototransistor is proposed and investigated numerically by self-consistently solving the Schr{\"o}dinger equation and\&nbsp;Poisson equation\&nbsp;using\&nbsp;non-equilibrium\&nbsp;Green{\textquoteright}s function\&nbsp;(NEGF) formalism. An overall performance metrics comparison between both the conventional\&nbsp;Si-based\&nbsp;phototransistor\&nbsp;and the proposed design is performed. It is found that the proposed\&nbsp;GNR Ge-phototransistor provides better electrical and optical performances compared to the conventional counterpart. Moreover, using\&nbsp;GNR\&nbsp;material as a channel can improve the device performance not only enables a high\&nbsp;Ion/Ioff\&nbsp;ratio, but also allows achieving a superior sensitivity for ultra-low\&nbsp;optical powers. It is also revealed that the\&nbsp;responsivity\&nbsp;of the investigated design can be increased by reducing the\&nbsp;GNR\&nbsp;channel length. This underlines the outstanding capability of the proposed design for bridging the gap between modern\&nbsp;nanoelectronic\&nbsp;and\&nbsp;nanophotonic\&nbsp;technologies. In addition, the proposed\&nbsp;GNR-based\&nbsp;Ge-phototransistor can achieve an acceptable detectivity for very weak optical power intensities, in the order of some\&nbsp;Femto-Watts, which leads to reduce the total\&nbsp;power consumption\&nbsp;associated with\&nbsp;optical links. Therefore, the proposed\&nbsp;GNR\&nbsp;phototransistor pinpoints a new path toward achieving an ultrasensitive photoreceiver with\&nbsp;low power consumption, which makes it potential alternative for chip-level Infrared communication and nano-optoelectronic applications.},
	author = {A.Kadri and F.Djeffal and H. Ferhati and F.Menacer and Z. Dibi}
}
