Electrical and Electronic Engineering - Research Publications

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Author: Skafidas, Efstratios × Author: Nirmalathas, Ampalavanapillai × Start date: 2014 × End date: 2014 ×

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    All-Graphene Planar Self-Switching MISFEDs, Metal-Insulator-Semiconductor Field-Effect Diodes
    Al-Dirini, F ; Hossain, FM ; Nirmalathas, A ; Skafidas, E (NATURE PORTFOLIO, 2014-02-05)
    Graphene normally behaves as a semimetal because it lacks a bandgap, but when it is patterned into nanoribbons a bandgap can be introduced. By varying the width of these nanoribbons this band gap can be tuned from semiconducting to metallic. This property allows metallic and semiconducting regions within a single Graphene monolayer, which can be used in realising two-dimensional (2D) planar Metal-Insulator-Semiconductor field effect devices. Based on this concept, we present a new class of nano-scale planar devices named Graphene Self-Switching MISFEDs (Metal-Insulator-Semiconductor Field-Effect Diodes), in which Graphene is used as the metal and the semiconductor concurrently. The presented devices exhibit excellent current-voltage characteristics while occupying an ultra-small area with sub-10 nm dimensions and an ultimate thinness of a single atom. Quantum mechanical simulation results, based on the Extended Huckel method and Nonequilibrium Green's Function Formalism, show that a Graphene Self-Switching MISFED with a channel as short as 5 nm can achieve forward-to-reverse current rectification ratios exceeding 5000.
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    Graphene Field Effect Nanopore Glycine Detector
    Al-Dirini, F ; Hossain, MS ; Qiu, W ; Hossain, FM ; Nirmalathas, A ; Skafidas, E (IEEE, 2014)
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    Experimental demonstration of free-space based 120 Gb/s reconfigurable card-to-card optical interconnects
    Wang, K ; Nirmalathas, A ; Lim, C ; Skafidas, E ; Alameh, K (OPTICAL SOC AMER, 2014-10-01)
    In this Letter, we propose and experimentally demonstrate a free-space based reconfigurable card-to-card optical interconnect architecture with 16-carrierless-amplitude-phase modulation. Experimental results show that up to 120 Gb/s (3×40  Gb/s) flexible interconnection can be achieved for up to 30 cm distance with a worst-case receiver sensitivity of -9.70  dBm.