Indian Journal of Pure and Applied Physics

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Tuning of the Plasmonic Response Gold and Aluminum Nanoarrays for Sensing Applications


Affiliations
1 Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar 140 001, India
2 Department of Materials and Metallurgical Engineering, Punjab Engineering College (Deemed to be University), Chandigarh 160 012, India

Nanoarrays are at the forefront of research and commercial plasmonic devices. The shape, size, and material of the structures present in the nanoarrays determine their optical response. Therefore, the performance and operating wavelength range of the nanoarrays can be tuned by the aforementioned parameters. The effect of shape, size, thickness, and periodicity of nanoarrays of gold and aluminum was compared using simulations. The coupling effect of the resonant modes observed in the nanoarrays resulted in a sharp and intense dip in the transmission spectra, which could be used for next generation chemical and biosensors. To quantify the performance, sensitivity of Au and Al nanoarrays were compared.

Keywords

Plasmons, Localized surface plasmon resonance (LSPR), Sensing, Gold nanoparticles
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  • Tuning of the Plasmonic Response Gold and Aluminum Nanoarrays for Sensing Applications

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Authors

Gaurav Pal Singh
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar 140 001, India
Raj Harsh
Department of Materials and Metallurgical Engineering, Punjab Engineering College (Deemed to be University), Chandigarh 160 012, India
Neha Sardana
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar 140 001, India

Abstract


Nanoarrays are at the forefront of research and commercial plasmonic devices. The shape, size, and material of the structures present in the nanoarrays determine their optical response. Therefore, the performance and operating wavelength range of the nanoarrays can be tuned by the aforementioned parameters. The effect of shape, size, thickness, and periodicity of nanoarrays of gold and aluminum was compared using simulations. The coupling effect of the resonant modes observed in the nanoarrays resulted in a sharp and intense dip in the transmission spectra, which could be used for next generation chemical and biosensors. To quantify the performance, sensitivity of Au and Al nanoarrays were compared.

Keywords


Plasmons, Localized surface plasmon resonance (LSPR), Sensing, Gold nanoparticles