Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches

doi:10.1039/c7ra13154b

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Improved performance of optical phased arrays assisted by transparent graphene nanoheaters and air trenches
	Wang, Y. B.; Liang, L.; Chen, Y. Y.; Jia, P.; Qin, L.; Liu, Y.; Ning, Y. Q.; Wang, L. J.
刊名	Rsc Advances
	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.
内容类型	期刊论文
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.