Single and multiband THz metamaterial polarisers

Bagvanth Reddy Sangala; Arvind Nagarajan; Prathmesh Deshmukh; Harshad Surdi; Goutam Rana; Venu Gopal Achanta; S.S. Prabhu

doi:10.1007/s12043-019-1876-2

Single and multiband THz metamaterial polarisers

Bagvanth Reddy Sangala (Corresponding author), Arvind Nagarajan, Prathmesh Deshmukh, Harshad Surdi, Goutam Rana, Venu Gopal Achanta, S.S. Prabhu

Electromagnetics

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

We report single and multiband linear polarisers for terahertz (THz) frequencies using cut-wire metamaterials (MM). The MMs were designed by finite-element method (FEM), fabricated by electron beam lithography, and characterised by THz time-domain spectroscopy. The MM unit cells consist of single or multiple length cut-wire pads of gold on semi-insulating gallium arsenide (GaAs) for single or multiple band polarisers. For example, a MM with a square unit cell of 50μm size on 1 mm GaAs substrate with a gold cut wire of 65μm length, 2μm width, and 150 nm height gives a resonance around 1.05 THz. The dependence of the resonance frequency of the single-band polariser on the length of the cut-wires was explained based on transmission line model.

Original language	English
Article number	2
Number of pages	6
Journal	Pramana
Volume	94
Issue number	1
DOIs	https://doi.org/10.1007/s12043-019-1876-2
Publication status	Published - 18 Dec 2019

Keywords

07.57.−c
42.25.Ja
78.67.Pt
Terahertz
metamaterial
polarisers

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10.1007/s12043-019-1876-2

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title = "Single and multiband THz metamaterial polarisers",

abstract = "We report single and multiband linear polarisers for terahertz (THz) frequencies using cut-wire metamaterials (MM). The MMs were designed by finite-element method (FEM), fabricated by electron beam lithography, and characterised by THz time-domain spectroscopy. The MM unit cells consist of single or multiple length cut-wire pads of gold on semi-insulating gallium arsenide (GaAs) for single or multiple band polarisers. For example, a MM with a square unit cell of 50μm size on 1 mm GaAs substrate with a gold cut wire of 65μm length, 2μm width, and 150 nm height gives a resonance around 1.05 THz. The dependence of the resonance frequency of the single-band polariser on the length of the cut-wires was explained based on transmission line model.",

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AU - Sangala, Bagvanth Reddy

AU - Nagarajan, Arvind

AU - Deshmukh, Prathmesh

AU - Surdi, Harshad

AU - Rana, Goutam

AU - Achanta, Venu Gopal

AU - Prabhu, S.S.

PY - 2019/12/18

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N2 - We report single and multiband linear polarisers for terahertz (THz) frequencies using cut-wire metamaterials (MM). The MMs were designed by finite-element method (FEM), fabricated by electron beam lithography, and characterised by THz time-domain spectroscopy. The MM unit cells consist of single or multiple length cut-wire pads of gold on semi-insulating gallium arsenide (GaAs) for single or multiple band polarisers. For example, a MM with a square unit cell of 50μm size on 1 mm GaAs substrate with a gold cut wire of 65μm length, 2μm width, and 150 nm height gives a resonance around 1.05 THz. The dependence of the resonance frequency of the single-band polariser on the length of the cut-wires was explained based on transmission line model.

AB - We report single and multiband linear polarisers for terahertz (THz) frequencies using cut-wire metamaterials (MM). The MMs were designed by finite-element method (FEM), fabricated by electron beam lithography, and characterised by THz time-domain spectroscopy. The MM unit cells consist of single or multiple length cut-wire pads of gold on semi-insulating gallium arsenide (GaAs) for single or multiple band polarisers. For example, a MM with a square unit cell of 50μm size on 1 mm GaAs substrate with a gold cut wire of 65μm length, 2μm width, and 150 nm height gives a resonance around 1.05 THz. The dependence of the resonance frequency of the single-band polariser on the length of the cut-wires was explained based on transmission line model.

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Single and multiband THz metamaterial polarisers

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