Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications.

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2019
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Abstract
We demonstrate a tunable longwave infrared photodetector with ultra-high sensitivity based on graphene surface plasmon polaritons controlled by ferroelectric domains. The simulated results show that the photodetector shows a tunable absorption peak, modulated by periodically polarized ferroelectric domains at the nanoscale, with an ultra-high responsivity up to 7.62 × 10 A W and a detectivity of ∼6.24 × 10 Jones (Jones = cm Hz W) in the wavelengths ranging from 5 to 20 μm at room temperature. The potential mechanism for the prominent performances of the proposed photodetector can be attributed to the highly confined graphene surface plasmons excited by the local electrical field across the interface of the graphene and ferroelectric layer resonant to the incident wavelength, which could be easily controlled by the features of the ferroelectric domains. Compared with the silicon-based graphene plasmonic photodetector using a complex process of micro-nano fabrication, the proposed photodetector provides the advantages of a more convenient and controllable technique without the need for patterning graphene, and lower energy consumption due to the non-volatile properties of the ferroelectrics without an additional contact electrode. The tunable spectral response and the ultra-high responsivity make the graphene plasmonic photodetector tuned by the ferroelectric domains promising in practical applications of micro-spectrometers and other light sensing devices.
Reference Key
guo2019simulationnanoscale Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Guo, Junxiong;Liu, Yu;Lin, Yuan;Tian, Yu;Zhang, Jinxing;Gong, Tianxun;Cheng, Tiedong;Huang, Wen;Zhang, Xiaosheng;
Journal Nanoscale
Year 2019
DOI
10.1039/c9nr06508c
URL
Keywords
functionalization optical biosensors label-free imaging porous silicon

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