10.57647/j.jtap.2025.1902.25

Design and analysis of bi-layer graphene based photodetector enhanced by metallic nano-antenna

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  • Mahsa Naghipour1,
  • Mahdi Zavvari*2,
  • Hassan Rasooli Saghai3,
  1. Department of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran.
  2. Antenna and Microwave Research Center, Urmia Branch, Islamic Azad University, Urmia, Iran.
  3. Department of Electrical Engineering, Tabriz branch, Islamic Azad University, Tabriz, Iran.

Received: 2025-01-05

Revised: 2025-02-10

Accepted: 2025-04-10

Published 2025-04-10

Copyright (c) 2025 Mahsa Naghipour, Mahdi Zavvari, Hassan Rasooli Saghai (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

1.
Naghipour M, Zavvari M, Rasooli Saghai H. Design and analysis of bi-layer graphene based photodetector enhanced by metallic nano-antenna. J Theor Appl phys. 2025 Apr. 10;19(2 (April 2025):1-7. Available from: https://oiccpress.com/jtap/article/view/16595
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Abstract

A new design of graphene-based photodetectors is proposed and studied to be used in near and mid-IR
applications. To do so, a bi-layer graphene is implemented as active photo-absorbing region and its absorption
spectra was calculated. Based on its response peak, an array of metallic nano rods is designed to be inserted
between two layers of graphene and resonate in desired response wavelengths. Such a resonance causes
induction and enhancement of incident field in the upper and lower graphene layers and leads to increased
absorption. The results show that by using the nano-rods, the mid-IR absorption response of graphene
bi-layer is doubled around 6.8 μm, however it is polarization-dependent. We also studied performance
characteristics of device such as photo-responsivity, dark and photocurrent and specific detectivity. According
the calculations, the proposed photodetector exhibits responsivity as high as about 27 A/W which is higher
than previously reported works.

Keywords

  • Graphene,
  • Photodetector,
  • Plasmonic,
  • Photonic crystals
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