Nanorods-embedded Ring Resonator-based Plasmonic Sensor for Adulteration Detection in Honey Products

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Rahul Pandey, Kamal Kishor Choure, Rukhsar Zafar, Gausia Qazi, Rajendra Mitharwal, Ghanshyam Singh, Santosh Kumar
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Abstract

A highly sensitive plasmonic refractive index sensor using a circular ring resonator incorporating silver nanorods as defects are designed and investigated numerically in this article. The numerical investigation focuses on the impact of varying nanorod radius on the sensor’s performance. Results show that two distinct resonant dips in the transmittance spectrum are identified in the near-infrared region, where the second dip has found to have a heightened sensitivity which is particularly advantageous for chemical and biological sensing. The study reveals that increasing the nanorod radius enhances sensor sensitivity and results in a noticeable red shift in dip positions. The sensor attains a peak sensitivity of 2105 nm/RIU at nanorod radius of 22 nm. Furthermore, the proposed sensor is examined for its effectiveness in detecting adulteration in pure honey by sensing the change in resonance wavelength. The observations reveal the sensor’s capability to identify the percentage of externally introduced glucose and fructose in the honey by indicating shifts in resonance wavelength.

Abstract Image

基于纳米棒嵌入式环形谐振器的等离子传感器用于蜂蜜产品掺假检测
本文设计了一种高灵敏度的等离子体折射率传感器,该传感器采用了以银纳米棒为缺陷的圆环谐振器,并对其进行了数值研究。数值研究的重点是不同纳米棒半径对传感器性能的影响。结果表明,在近红外区域的透射光谱中发现了两个不同的共振点,其中第二个共振点具有更高的灵敏度,这对于化学和生物传感尤其有利。研究表明,增加纳米棒的半径可提高传感器的灵敏度,并导致浸渍位置发生明显的红移。当纳米棒半径为 22 纳米时,传感器的峰值灵敏度为 2105 nm/RIU。此外,通过感应共振波长的变化,研究了所提出的传感器在检测纯蜂蜜掺假方面的有效性。观察结果表明,该传感器能够通过显示共振波长的变化来识别蜂蜜中外部引入的葡萄糖和果糖的百分比。
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来源期刊
Plasmonics
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.
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