التفاصيل البيبلوغرافية
| العنوان: |
Highly efficient ultra-broad beam silicon nanophotonic antenna based on near-field phase engineering |
| المؤلفون: |
Shahrzad Khajavi (14418837), Daniele Melati (5540327), Pavel Cheben (3979865), Jens H. Schmid (4180717), Carlos A. Alonso Ramos (14418840), Winnie N. Ye (14418843) |
| سنة النشر: |
2022 |
| مصطلحات موضوعية: |
Physics (arXiv), physics.optics (arXiv) |
| الوصف: |
Optical antennas are a fundamental element in optical phased arrays (OPA) and free-space optical interconnects. An outstanding challenge in optical antenna design lies in achieving high radiation efficiency, ultra-compact footprint and broad radiation angle simultaneously, as required for dense 2D OPAs with a broad steering range. Here we demonstrate a fundamentally new concept of a nanophotonic antenna based on near-field phase-engineering. By introducing a specific near-field phase factor in the Fraunhofer transformation, the far-field beam is widened beyond the diffraction limit for a given aperture size. We use transversally interleaved subwavelength grating nanostructures to control the near-field phase. The antenna reaches a radiation efficiency of 82%, a compact footprint of 3.1 um * 1.75 um and an ultra-broad far-field beam width of 52{\deg} and 62{\deg} in the longitudinal and transversal direction, respectively. This unprecedented design performance is achieved with a single-etch grating nanostructure in a 300-nm SOI platform. |
| نوع الوثيقة: |
report |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/preprint/Highly_efficient_ultra-broad_beam_silicon_nanophotonic_antenna_based_on_near-field_phase_engineering/21890079 |
| DOI: |
10.48550/arxiv.2209.00622 |
| الاتاحة: |
https://doi.org/10.48550/arxiv.2209.00622 |
| Rights: |
CC0 |
| رقم الانضمام: |
edsbas.D0ADE7CE |
| قاعدة البيانات: |
BASE |