Electromagnetic jet produced with loaded waveguide ended by an optimized multi-rectangular sections tip

Hishem Hyani, Bruno Sauviac, Gérard Granet, Bernard Bayard, Stéphane Robert and Kofi Edee

Journal of Electromagnetic Waves and Applications, 2023, vol. 37, issue 18, 1587-1596

Abstract: Previous works have demonstrated that a parallel plate waveguide, equipped at the end with a tip, can be used to initiate an “electromagnetic jet (Ej)” (this name generalizes the photonic jet (Pj) phenomenon regardless of the wavelength). In addition to being easy to manufacture, a rectangular shape improves energy concentration, however concurrently the full-width at half maximum (FWHM) is slightly degraded. This article aims to introduce tips with multi-rectangular sections reducing the drawbacks previously mentioned. This article proposes the use of Aperiodic Polynomial Modal Method (A-PMM) as an efficient yet robust method to model and optimize an outgoing Ej, equipped with this kind of dielectric tips. Thus, a three rectangular sections tip can improve energy concentration and can reduce the FWHM beyond the diffraction limit compared to a single section tip.

Date: 2023
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DOI: 10.1080/09205071.2023.2262984

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