NDLI: Wideband tunable mid-infrared cross-polarisation converter using monolayered graphene-based metasurface over a wide angle of incidence

Content Provider	IET Digital Library
Author	Yadav, Vinit Singh Ghosh, Sambit Kumar Das, Santanu Bhattacharyya, Somak
Abstract	In this study, the authors have designed and proposed a monolayer graphene-based metasurface, performing as a broadband polarisation converter over a wide angle of incidence. The unit cell of the metasurface consists of split ring generated over a perforated single layer of graphene grown over metal-backed silicon dioxide. The structure converts incident linearly polarised wave into its cross-polarised component over a wide bandwidth with peak polarisation conversion exhibits value to unity. The plane of polarisation of the incident electromagnetic wave is rotated orthogonally on reflection from the proposed metasurface over full width at half maxima bandwidth around 72.83% compared with centre frequency of 2.16 THz, which can be maintained up to 40° incident angles under both transverse electric and transverse magnetic polarisations. The proposed structure is as thin as ∼λ/7.3 with respect to lowermost frequency and the period of the structure is about λ/10.7. The frequency band of polarisation conversion can be tuned by altering chemical doping as well as the electrostatic grating of the graphene sheet. The structure can find applications toward sensing, spectroscopy etc.
Starting Page	82
Ending Page	87
Page Count	6
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5373
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-09-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Broadband Polarisation Converter Cross-polarised Component Diffraction Gratings Electromagnetic Wave Absorption Electromagnetic Wave Polarisation Electromagnetic Wave Propagation Frequency 2.16 THz Graphene Graphene Sheet Incident Electromagnetic Wave Incident Linearly Polarised Wave Light Polarisation Metal-backed Silicon Dioxide Microwave MetaMaterial MonoLayer Monolayered Graphene-based Metasurface Numerical Approximation And Analysis Optical Material Optical MetaMaterial Optical Polarization Optical Property of Fullerenes And Related Material Peak Polarisation Conversion Exhibits Value Single Antenna Transverse Electric Polarisation Transverse Magnetic Polarisation Wide Bandwidth Wideband Tunable Mid-infrared Cross-Polarisation Converter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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