Room temperature sub-terahertz PIN-photodiode photodetector based on multiple graphene layer absorber

Babak Sakkaki; Hassan R. Saghai; Ghafar DarvishMehdi Khatir

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Room temperature sub-terahertz PIN-photodiode photodetector based on multiple graphene layer absorber

机译：Room temperature sub-terahertz PIN-photodiode photodetector based on multiple graphene layer absorber

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摘要

Given the importance of the 0.1- to 1-THz range in the security detection and diagnosis of cancer, we propose a structure for graphene-based terahertz (THz) photodetectors. We use the finite-difference time-domain and mathematical methods to calculate the light absorption in the graphene layers (GLs) and the detector's figure of merits, including responsivity and detectivity. The proposed photodetector is based on single-layer and multilayer graphene absorbers within a p-type-intrinsic-n-type (PIN) photodiode structure. This detector is designed to achieve maximum absorption at the THz frequencies by creating adjustable Fabry-Perot resonances. Results show that it has two distinct and adjustable detection peaks in THz. Sowe set the operating frequency to 0.35 and 0.83 THz by adjusting the geometric parameters of the device, which also fit the atmospheric windows. Despite the low number of GLs, high absorption is provided at room temperature. It has high responsivity peaks of ～1220 AW~(-1) at the frequency of 0.35 THz and 420 AW~(-1) at 0.83 THz, respectively, while we have achieved these characteristics with fewer GLs than other previous detectors.

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来源
《Optical Engineering》 |2021年第11期|117108-1-117108-15|共15页
作者
Babak Sakkaki; Hassan R. Saghai; Ghafar DarvishMehdi Khatir;
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作者单位

Islamic Azad University Science and Research Branch, Department of Electrical and Computer Engineering, Tehran, Iran;

Islamic Azad University, Tabriz Branch, Department of Electrical Engineering, Tabriz, Iran;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
关键词
finite-difference time-domain; graphene absorber; graphene sub-terahertz detector; PIN photodiode; room temperature performance;

Room temperature sub-terahertz PIN-photodiode photodetector based on multiple graphene layer absorber

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