Epsilon negative dynamic coded THz metamaterial beamformer for digital information encryption.

Ahamed, E; Keshavarz, R; Shariati, N

Epsilon negative dynamic coded THz metamaterial beamformer for digital information encryption.

Ahamed, E

Keshavarz, R Shariati, N

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Publisher:: Springer Nature
Publication Type:: Journal Article
Citation:: Sci Rep, 2024, 14, (1), pp. 27240
Issue Date:: 2024-11-08

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Field	Value	Language
dc.contributor.author	Ahamed, E https://orcid.org/0000-0001-5799-1632
dc.contributor.author	Keshavarz, R
dc.contributor.author	Shariati, N
dc.date.accessioned	2024-12-02T01:15:26Z
dc.date.available	2024-10-28
dc.date.available	2024-12-02T01:15:26Z
dc.date.issued	2024-11-08
dc.identifier.citation	Sci Rep, 2024, 14, (1), pp. 27240
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/182222
dc.description.abstract	Light propagation facilitates digital information encryption by utilizing Epsilon Negative (ENG) metamaterials as a medium. Achieving the desired encryption hinges on synchronizing two pivotal features: the phase difference and the epsilon shifting of the metamaterials. The proposed metamaterial is intricately designed to represent digital bit 1 (states 0 and 1), contingent upon the arrangement of material multilayers within the metamaterial device. Specifically, state 1 is fashioned through a combination of Graphene and Gold, while state 0 is solely represented by Graphene on a metamaterial structure. The developed structure exhibits right hand metamaterial (epsilon of [Formula: see text]7.20) for state 0 and plasma metamaterial (epsilon [Formula: see text]6.94) for state 1 at 8.6 THz. Notably, the phase difference between 0 and 1 states is around [Formula: see text]. Primarily leveraging the synchronized combination phase and epsilon as the key design parameters for the metamaterial array, the beamforming pattern enables beam steering within the angular range of [Formula: see text] to [Formula: see text]. Secondly, employing a sophisticated material addition strategy involving Gallium Arsenide (GaAs) systematically manipulates the sidelobe in specific directions, thereby providing a mechanism to modulate the sidelobe and concurrently augment spatial resolution. After preparing the metamaterial coded (MC) lens, the source, lens and receiver strategically encrypt the scanning image, employing techniques including Doppler compression and 2D discrete Fourier transform. The proposed MC lens offers applicability like image encryption, security scanning, conveyor systems, hyperlenses and modern cryptography.
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Nature
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/s41598-024-78003-3
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Epsilon negative dynamic coded THz metamaterial beamformer for digital information encryption.
dc.type	Journal Article
utslib.citation.volume	14
utslib.location.activity	England
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated	2024-12-02T01:15:21Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	14
utslib.citation.issue	1

Abstract:

Light propagation facilitates digital information encryption by utilizing Epsilon Negative (ENG) metamaterials as a medium. Achieving the desired encryption hinges on synchronizing two pivotal features: the phase difference and the epsilon shifting of the metamaterials. The proposed metamaterial is intricately designed to represent digital bit 1 (states 0 and 1), contingent upon the arrangement of material multilayers within the metamaterial device. Specifically, state 1 is fashioned through a combination of Graphene and Gold, while state 0 is solely represented by Graphene on a metamaterial structure. The developed structure exhibits right hand metamaterial (epsilon of [Formula: see text]7.20) for state 0 and plasma metamaterial (epsilon [Formula: see text]6.94) for state 1 at 8.6 THz. Notably, the phase difference between 0 and 1 states is around [Formula: see text]. Primarily leveraging the synchronized combination phase and epsilon as the key design parameters for the metamaterial array, the beamforming pattern enables beam steering within the angular range of [Formula: see text] to [Formula: see text]. Secondly, employing a sophisticated material addition strategy involving Gallium Arsenide (GaAs) systematically manipulates the sidelobe in specific directions, thereby providing a mechanism to modulate the sidelobe and concurrently augment spatial resolution. After preparing the metamaterial coded (MC) lens, the source, lens and receiver strategically encrypt the scanning image, employing techniques including Doppler compression and 2D discrete Fourier transform. The proposed MC lens offers applicability like image encryption, security scanning, conveyor systems, hyperlenses and modern cryptography.

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http://hdl.handle.net/10453/182222