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research article

Parallel temporal signal processing enabled by polarization-multiplexed programmable THz metasurfaces

Tahmasebi, Omid
•
Abdolali, Ali
•
Rajabalipanah, Hamid
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December 5, 2022
Optics Express

Under the trends of multifunctionality, tunability, and compactness in modern wave -based signal processors, in this paper, we propose a polarization-multiplexed graphene-based metasurface to realize distinct mathematical operators on the parallel time-domain channels enabled by vertical and horizontal polarizations. The designed metasurface is composed of two perpendicularly-oriented graphene strips for each of which the chemical potential can be dynamically tuned through a DC biasing circuit. The programmable metasurface exhibits two orthogonal channels through which the time-domain input signals are elaborately processed by separate mathematical functions. Several illustrative examples are presented demonstrating that the proposed device can operate on different time-domain analog computing modes such as fractional-order differentiator and phaser at the same time. The strategy introduced in this paper will enable real-time parallel temporal analog computing and has potentially essential applications in terahertz spectroscopy architectures, communication systems, and computing technologies.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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Type
research article
DOI
10.1364/OE.471338
Web of Science ID

WOS:000894860500004

Author(s)
Tahmasebi, Omid
•
Abdolali, Ali
•
Rajabalipanah, Hamid
•
Momeni, Ali  
•
Fleury, Romain  
Date Issued

2022-12-05

Publisher

Optica Publishing Group

Published in
Optics Express
Volume

30

Issue

25

Start page

45221

End page

45232

Subjects

Optics

•

design

•

differentiator

•

integrator

•

generation

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LWE  
Available on Infoscience
January 16, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/193782
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