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

doi:10.1039/c7ra13154b

CIOMP OpenIR

	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.
	2018
发表期刊	Rsc Advances
ISSN	2046-2069
卷号	8 期号:15 页码:8442-8449
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.
关键词	silicon-on-insulator layer graphene modulator transistors switch films lidar Chemistry
DOI	10.1039/c7ra13154b
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	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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