| Autor: |
Xu, Weijie, Jiang, Xianxian, Bao, Yelong, Wang, Junjia |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
With the rapid development of large-scale integrated photonics, optical phased array (OPA) is an effective way to realize highly integrated, stable and low-cost beam control system. Achieving a large field of view (FOV) in the longitudinal direction without increasing fabrication cost and system complexity is still a significant challenge in OPA antennas. Here, a high sensitivity and large scanning range antenna based on subwavelength structure array is proposed to enhance the longitudinal scanning and free-space radiating efficiency by using the ridge-waveguide structure and backward-emitting. A millimeter-long grating antenna with a far-field beam divergence of 0.13{\deg} and a wavelength sensitivity of 0.237{\deg}/nm is experimentally demonstrated. Furthermore, by using different sideband periods, we introduce a multi-casting grating antenna with a large scanning range up to 42.6{\deg}. The proposed devices show significant improvement in longitudinal wavelength sensitivity compared with the typical waveguide grating antennas. |
| Databáze: |
arXiv |
| Externí odkaz: |
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