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Pré-Publication, Document De Travail (Preprint/Prepublication) Année : 2024

Polarization independent silicon grating antenna based on subwavelength metamaterials

Sarra Salhi
  • Fonction : Auteur
  • PersonId : 1377781
Xiaochen Xin
  • Fonction : Auteur
  • PersonId : 1377782
Daniel Benedikovic
Eric Cassan
Winnie Ye
Daniele Melati

Résumé

Optical antennas are key components of an optical phased array system, enabling light coupling between the chip and the free space. In such systems, surface gratings are commonly used as antenna elements, which however suffer from a strong polarization sensitivity of their scattering angle and efficiency. Here, we experimentally demonstrate a surface grating antenna with polarization insensitive behavior on the 500 nm silicon-on-insulator platform exploiting subwavelength metamaterials. The antenna successfully achieves the same diffraction angle of 10° for both TE and TM polarizations, an estimated scattering efficiency of -4 dB, and a difference in diffraction efficiency between the two polarizations smaller than 1 dB over a bandwidth of 31 nm. This antenna facilitates efficient light coupling into and out of photonic integrated circuits.
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Licence : CC BY - Paternité

Dates et versions

hal-04557012 , version 1 (23-04-2024)

Identifiants

  • HAL Id : hal-04557012 , version 1

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Sarra Salhi, Xiaochen Xin, Daniel Benedikovic, Carlos Alonso-Ramos, Laurent Vivien, et al.. Polarization independent silicon grating antenna based on subwavelength metamaterials. 2024. ⟨hal-04557012⟩
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