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Design and optimization of bowtie nanoantenna for electromagnetic field enhancement

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Abstract

Designing a plasmonic structure having high near field enhancement of incident field, large hot spot area, wideband resonance, and multiple resonance peaks are the key elements to obtain large electromagnetic field enhancement factor for various biosensors like surface-enhanced Raman scattering and Spasers. In this paper, we have proposed three different configurations of the bowtie nanoantenna represented as Single Bowtie Structure, Double Bowtie Structure (DBS), and Triple Bowtie Structure (TBS). Numerical simulations are performed with the characteristics of Nanoantenna and the analysis of the influence of the size parameter of the antennas along with the optimization of this parameter is performed to achieve the maximum near field enhancement. The result shows that TBS delivers the highest enhancement factor with a triple resonance peak. Whereas, in the second portion, the demonstrated results show the influence of the size on the enhancement of the incident field which further indicates, that as the size reduces the enhancement decreases. Furthermore, variations in the gap are simulated with four types having simple bowtie structure, reduced symmetry of DBS, reduced symmetry of TBS, and double reduced symmetry of TBS. The results significantly showed that type 4 configuration covers a wider wavelength with enhanced near electromagnetic field.

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Acknowledgements

The authors would like to thank Sarhad University of Science and Information Technology (SUIT) and Center for Advanced Studies in Energy, University of Engineering and Technology for the support provided for this research.

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Authors and Affiliations

  1. Department of Electrical Engineering, Sarhad University of Science & Information Technology, Peshawar, 25000, Pakistan

    Usman Khan Khalil, Waqas Farooq, Javed Iqbal, Syed Zain Ul Abideen Kazmi & Anees Ur Rehman

  2. Center for Advanced Studies in Energy, University of Engineering and Technology, Peshawar, 25000, Pakistan

    Adnan Daud Khan

  3. Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Tronoh, Perak, Malaysia

    Saba Ayub

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  1. Usman Khan Khalil
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  2. Waqas Farooq
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  3. Javed Iqbal
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  4. Syed Zain Ul Abideen Kazmi
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  5. Adnan Daud Khan
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  6. Anees Ur Rehman
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Correspondence to Waqas Farooq.

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Khalil, U.K., Farooq, W., Iqbal, J. et al. Design and optimization of bowtie nanoantenna for electromagnetic field enhancement. Eur. Phys. J. Plus 136, 754 (2021). https://doi.org/10.1140/epjp/s13360-021-01702-7

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  • DOI: https://doi.org/10.1140/epjp/s13360-021-01702-7

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