Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Zhu, J; Li, S; Deng, L; Zhang, C; Yang, Y; Zhu, H

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Zhu, J Li, S Deng, L Zhang, C Yang, Y

Zhu, H

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Publication Type:: Journal Article
Citation:: Optical Materials Express, 2018, 8 (5), pp. 1164 - 1173
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Zhu, J	en_US
dc.contributor.author	Li, S	en_US
dc.contributor.author	Deng, L	en_US
dc.contributor.author	Zhang, C	en_US
dc.contributor.author	Yang, Y https://orcid.org/0000-0001-7439-2156	en_US
dc.contributor.author	Zhu, H	en_US
dc.date.issued	2018-01-01	en_US
dc.identifier.citation	Optical Materials Express, 2018, 8 (5), pp. 1164 - 1173	en_US
dc.identifier.uri	http://hdl.handle.net/10453/130190
dc.description.abstract	© 2018 Optical Society of Americaunder. A new wideband sinusoidally-slotted graphene-based cross-polarization converter (CPC) is proposed in this paper. The proposed polarization converter can realize a broadband terahertz polarization conversion from 1.28 to 2.13-THz with a polarization conversion ratio (PCR) of more than 0.85. Taking advantage of the gradient width modulation of the graphene-based unit structure, the continuous plasmon resonances are excited at the edges of the sinusoidal slot. Therefore, the proposed converter can achieve a broadband polarization conversion in a simplified structure. Furthermore, the polarization conversion characteristics of the CPC are insensitive to the incident angle. The PCR remains more than 0.85 with little bandwidth degradation even as the incident angle increases to as high as 50°. More importantly, the operating bandwidth and the magnitude of the PCR can be tuned easily by adjusting the chemical potential and the electron scattering times of the graphene. In a way, we believe this kind of graphene-based polarization converter can enrich the polarization conversion community for realizing broadband and tunable polarization conversion.	en_US
dc.relation.ispartof	Optical Materials Express	en_US
dc.relation.isbasedon	10.1364/OME.8.001164	en_US
dc.rights	© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.citation.volume	8	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	1007 Nanotechnology	en_US
pubs.embargo.period	Not known	en_US
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	*
pubs.issue	5	en_US
pubs.publication-status	Published	en_US
pubs.volume	8	en_US

Abstract:

© 2018 Optical Society of Americaunder. A new wideband sinusoidally-slotted graphene-based cross-polarization converter (CPC) is proposed in this paper. The proposed polarization converter can realize a broadband terahertz polarization conversion from 1.28 to 2.13-THz with a polarization conversion ratio (PCR) of more than 0.85. Taking advantage of the gradient width modulation of the graphene-based unit structure, the continuous plasmon resonances are excited at the edges of the sinusoidal slot. Therefore, the proposed converter can achieve a broadband polarization conversion in a simplified structure. Furthermore, the polarization conversion characteristics of the CPC are insensitive to the incident angle. The PCR remains more than 0.85 with little bandwidth degradation even as the incident angle increases to as high as 50°. More importantly, the operating bandwidth and the magnitude of the PCR can be tuned easily by adjusting the chemical potential and the electron scattering times of the graphene. In a way, we believe this kind of graphene-based polarization converter can enrich the polarization conversion community for realizing broadband and tunable polarization conversion.

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http://hdl.handle.net/10453/130190