Dr. Abbas Zarifkar Profile

Dr. Abbas Zarifkar

at Shiraz Univ

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SPIE Journal Paper | 28 March 2018

Electro-optical full-adder/full-subtractor based on graphene–silicon switches

Hossein Zivarian, Abbas Zarifkar, Mehdi Miri

JNP, Vol. 12, Issue 01, 016022, (March 2018) https://doi.org/10.1117/12.10.1117/1.JNP.12.016022

KEYWORDS: Electro optics, Graphene, Switches, Silicon, Waveguides, Phase shifts, Switching, Eye, Interferometers, Logic

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A compact footprint, low-power consumption, and high-speed operation electro-optical full-adder/full-subtractor based on graphene–silicon electro-optical switches is demonstrated. Each switch consists of a Mach–Zehnder interferometer in which few-layer graphene is embedded in a silicon slot waveguide to construct phase shifters. The presented structure can be used as full-adder and full-subtractor simultaneously. The analysis of various factors such as extinction ratio, power consumption, and operation speed has been presented. As will be shown, the proposed electro-optical switch has a minimum extinction ratio of 36.21 dB, maximum insertion loss about 0.18 dB, high operation speed of 180 GHz, and is able to work with a low applied voltage about 1.4 V. Also, the extinction ratio and insertion loss of the full-adder/full-subtractor are about 30 and 1.5 dB, respectively, for transfer electric modes at telecommunication wavelength of 1.55 μm.

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