التفاصيل البيبلوغرافية
| العنوان: |
Single and multiband THz metamaterial polarisers. |
| المؤلفون: |
Sangala, Bagvanth Reddy, Nagarajan, Arvind, Deshmukh, Prathmesh, Surdi, Harshad, Rana, Goutam, Achanta, Venu Gopal, Prabhu, S S |
| المصدر: |
Pramana: Journal of Physics; 2020, Vol. 94 Issue 1, p1-6, 6p |
| مصطلحات موضوعية: |
ELECTRON beam lithography, UNIT cell, FINITE element method, GALLIUM arsenide, ELECTRIC lines, PHONONIC crystals |
| مستخلص: |
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 50 μ m size on 1 mm GaAs substrate with a gold cut wire of 65 μ m length, 2 μ m 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. [ABSTRACT FROM AUTHOR] |
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