Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches
文献类型：期刊论文
| 作者 | Wang, Y. B.; Liang, L.; Chen, Y. Y.; Jia, P. ; Qin, L.; Liu, Y.; Ning, Y. Q.; Wang, L. J.
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| 刊名 | Rsc Advances
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:15页码:8442-8449 |
| 关键词 | silicon-on-insulator layer graphene modulator transistors switch films lidar Chemistry |
| ISSN号 | 2046-2069 |
| DOI | 10.1039/c7ra13154b |
| 英文摘要 | In this paper, high-performance optical phased arrays (OPAs) assisted by transparent graphene nanoheaters and air trenches have been designed and simulated. By directly locating graphene nanoheaters on silicon waveguides, heating efficiency is enhanced by 62.96% compared to conventional structures with 1 mm SiO2 overlays, and is further enhanced by a factor of 200% by the presence of air trenches. Thanks to the high thermal conductivity of graphene, a record-high operation speed on the order of 200 kHz is realized. Power consumption for pi phase shift is 4.65 mW, approximately half of that of the state-of-the-art OPAs. By introducing air trenches, thermal crosstalk is significantly reduced, resulting in an enlarged fill factor. In addition, a novel beam steering scheme in the theta direction is proposed. By applying a 30 mW heating power, a temperature gradient along antennas is generated and beam steering of 2.3 degrees is achieved, satisfying applications such as long-range collision avoidance for autonomous driving. |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/61030]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Y. B.,Liang, L.,Chen, Y. Y.,et al. Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches[J]. Rsc Advances,2018,8(15):8442-8449. |
| APA | Wang, Y. B..,Liang, L..,Chen, Y. Y..,Jia, P..,Qin, L..,...&Wang, L. J..(2018).Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches.Rsc Advances,8(15),8442-8449. |
| MLA | Wang, Y. B.,et al."Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches".Rsc Advances 8.15(2018):8442-8449. |
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