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Design and Analysis of Infrared Tunable All-Optical Filters Based on Plasmonic Hybrid Nanostructure Using Periodic Nanohole Arrays

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Abstract

A tunable high transmission optical bandpass filter based on a plasmonic hybrid nanostructure, composed of a periodic array of nanocircles and nanoholes combining two isolated waveguides is introduced in this paper. The presented design improves the coupling, which results in a higher transmission peak. To study the filtering operation, different topologies are investigated. The transmission properties and the resonance wavelengths are adjusted by sweeping various geometrical parameters. A multimode spectrum for each of the topologies is obtained. A tunable bandgap and bandwidth can be obtained by adjusting the refractive index of the periodic nanostructure. We have reached a maximum quality factor and a small full width at half-maximum bandwidth with the maximum transmission values greater than 80%. The advantages of the presented structures which include the benefits of both plasmonic and periodic nanostructures are tunability, high detection resolution, and integrability at the nanoscale for optical applications.

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Data Availability

The data that supports the findings of this study are available from the corresponding author upon request.

Code Availability

The simulation code that supports the findings of this study is available from the corresponding author upon request.

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Authors and Affiliations

  1. Photonics Research Laboratory (PRL), Electrical Engineering Department, Amirkabir University of Technology, Tehran, Iran

    Sara Gholinezhad Shafagh & Hassan Kaatuzian

  2. Electrical and Computer Engineering Faculty, Semnan University, Semnan, Iran

    Mohammad Danaie

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  1. Sara Gholinezhad Shafagh
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  2. Hassan Kaatuzian
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  3. Mohammad Danaie
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SGS performed the conceptualization, methodology, software, validation, and writing–original draft. HK performed the writing–review and editing, supervision, and project administration. MD performed the writing–review and editing, supervision, and project administration.

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Correspondence to Hassan Kaatuzian.

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Shafagh, S.G., Kaatuzian, H. & Danaie, M. Design and Analysis of Infrared Tunable All-Optical Filters Based on Plasmonic Hybrid Nanostructure Using Periodic Nanohole Arrays. Plasmonics 17, 693–708 (2022). https://doi.org/10.1007/s11468-021-01558-8

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