Compact and highly-efficient broadband surface grating antenna on a silicon platform | Zendy

Shahrzad Khajavi | Zendy; Daniele Melati | Zendy; Pavel Cheben | Zendy; Jens H. Schmid | Zendy; Qiankun Liu | Zendy; Dan-Xia Xu | Zendy; Winnie N. Ye | Zendy

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Compact and highly-efficient broadband surface grating antenna on a silicon platform

Author(s) -

Shahrzad Khajavi,

Daniele Melati,

Pavel Cheben,

Jens H. Schmid,

Qiankun Liu,

Dan-Xia Xu,

Winnie N. Ye

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.416986

Subject(s) - optics , materials science , diffraction efficiency , grating , broadband , silicon , diffraction grating , diffraction , optoelectronics , wavelength , antenna (radio) , blazed grating , bandwidth (computing) , physics , telecommunications , computer science

We present a compact silicon-based surface grating antenna design with a high diffraction efficiency of 89% (-0.5 dB) and directionality of 0.94. The antenna is designed with subwavelength-based L-shaped radiating elements in a 300-nm silicon core, maintaining high efficiency with a compact footprint of 7.6 µm × 4.5 µm. The reflectivity remains below -10 dB over the S, C and L optical communication bands. A broad 1-dB bandwidth of 230 nm in diffraction efficiency is achieved with a central wavelength of 1550 nm.

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