Sensitivity-Enhanced Surface Plasmon Resonance Sensor Based on Zinc Oxide and BlueP-MoS2 Heterostructure

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2023-05-27 DOI:10.1007/s11468-023-01884-z

Ritayan Kashyap, Udit Ranjan Baruah, Abhijeet Gogoi, Biplob Mondal

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引用次数: 3

Abstract

A novel design of a surface plasmon resonance (SPR) sensor based on the heterostructure of 2D nanomaterials, viz. blue phosphorus (BlueP) and molybdenum disulfide (MoS₂), coupled with an adhesive layer of zinc oxide (ZnO) is presented here to enable significant plasmonic performance enhancement. The five-layer SPR system based on the Kretschmann configuration consists of ZnO sandwiched between a BK7 glass prism and gold (Au) layer, a BlueP-MoS₂ heterostructure, and a sensing medium. The numerical analysis of the proposed sensor is carried out using the transfer matrix method and the sensor performance parameters; sensitivity, full width at half maximum (FWHM), and quality factor (QF) are studied at an operating wavelength of 633 nm for refractive index change in the range 1.33–1.335 RIU. The thicknesses of the Au, ZnO, and BlueP-MoS₂ heterostructure layers are optimized and the sensitivity (260°/RIU) and QF (48.14 RIU⁻¹) of the proposed sensor with 48 nm Au, 6 nm ZnO, and a monolayer of BlueP-MoS₂ (0.75 nm) are enhanced by 51.16% and 19.3% over the conventional SPR sensor. The rational design of the proposed SPR sensor delivering significantly large sensitivity is suited for experimental realization to deploy ZnO as an effective adhesive layer with the BlueP-MoS₂ heterostructure for improved sensing performance.

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基于氧化锌和BlueP-MoS2异质结构的灵敏度增强型表面等离子体共振传感器

本文提出了一种新型的表面等离子体共振（SPR）传感器设计，该传感器基于二维纳米材料的异质结构，即蓝磷（BlueP）和二硫化钼（MoS2），并结合氧化锌（ZnO）粘合层，以显著提高等离子体性能。基于Kretschmann配置的五层SPR系统由夹在BK7玻璃棱镜和金（Au）层之间的ZnO、BlueP-MoS2异质结构和传感介质组成。利用传递矩阵法和传感器性能参数对所提出的传感器进行了数值分析；在633 nm的工作波长下，研究了折射率在1.33–1.335 RIU范围内变化时的灵敏度、半峰全宽（FWHM）和品质因数（QF）。优化了Au、ZnO和BlueP-MoS2异质结构层的厚度，与传统SPR传感器相比，所提出的具有48 nm Au、6 nm ZnO和单层BlueP-MoS20.75 nm的传感器的灵敏度（260°/RIU）和QF（48.14 RIU−1）分别提高了51.16%和19.3%。所提出的具有显著大灵敏度的SPR传感器的合理设计适合于实验实现，以将ZnO部署为与BlueP-MoS2异质结构的有效粘合层，从而提高传感性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.