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سی و سومین کنفرانس بین المللی مهندسی برق
Controllable UWB THz Absorber Using a New Single-layer Graphene-based Grating
نویسندگان :
Mahdieh Bozorgi
1
Mahmood Rafaei Booket
2
Mohammad Amin Zolghadr
3
1- دانشگاه زنجان
2- دانشگاه زنجان
3- دانشگاه زنجان
کلمات کلیدی :
Terahertz (THz)،Graphene-based grating،Ultra-wideband (UWB) absorber.
چکیده :
In this paper, an Ultra-Wideband (UWB) graphene-based grating absorber is designed for Terahertz (THz) applications. In the design of its unit cell, a patterned and a continuous graphene sheets separated by a quartz (SiO2) dielectric are used. Each step of the design approach is numerically analyzed with the help of a commercial EM-solver. The calculated absorptivity in the result of normally incident plane-waves reveals an absorption bandwidth 194% with absorptivity more than 80% from 0.1 to 7THz. The unit cell's dimensions of this polarization-insensitive grating are found to be λ0/300, where λ0 is free space wavelength at 0.1THz. It is shown that the proposed absorber has an excellent performance for both TE- and TM-polarized obliquely incident plane-waves once the incidence angle < 80o. By changing the chemical potentials of graphene sheets, this absorber provides a good flexibility in its frequency behavior.
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بیشتر
ثمین همایش، سامانه مدیریت کنفرانس ها و جشنواره ها - نگارش 44.7.2
