Large angle deflection of beam using high contrast grating

WANG Chaosu; JIANG Xiaowei

doi:10.7510/jgjs.issn.1001-3806.2021.04.012

LASER TECHNOLOGY > 2021 > 45(4): 485-491. > DOI: 10.7510/jgjs.issn.1001-3806.2021.04.012

WANG Chaosu, JIANG Xiaowei. Large angle deflection of beam using high contrast grating[J]. LASER TECHNOLOGY, 2021, 45(4): 485-491. DOI: 10.7510/jgjs.issn.1001-3806.2021.04.012

Citation:

WANG Chaosu, JIANG Xiaowei. Large angle deflection of beam using high contrast grating[J]. LASER TECHNOLOGY, 2021, 45(4): 485-491. DOI: 10.7510/jgjs.issn.1001-3806.2021.04.012

Citation:

WANG Chaosu, JIANG Xiaowei. Large angle deflection of beam using high contrast grating[J]. LASER TECHNOLOGY, 2021, 45(4): 485-491. DOI: 10.7510/jgjs.issn.1001-3806.2021.04.012

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Large angle deflection of beam using high contrast grating

WANG Chaosu¹,
JIANG Xiaowei^1,2, ,

1.
College of Information Engineering, Quzhou College of Technology, Quzhou 324000, China
2.
Optoelectronics Technology Laboratory of Ministry of Education, Beijing University of Technology, Beijing 100124, China

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Received Date: July 23, 2020
Revised Date: September 11, 2020
Published Date: July 24, 2021

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Abstract

Abstract

In order to analyze the influence of high contrast grating(HCG) parameters and incident wavelength on beam deflection angle, the rigorous coupled wave method was used to design a deflectable non-periodic triangular HCG, and it is proved that 30.3° beam deflection can be achieved in the designed non-periodic triangular HCG by the finite-difference time-domain (FDTD). At the same time, it is found that when the refractive index of the low refractive index material increases from 1 to 1.4, the deflection angle of the transmission beam can achieve 11° tuning, and when the incident wavelength increases from 1.5μm to 1.6μm, the aperiodic triangular HCG can achieve 3.527° transmission beam deflection angle tuning. The results can provide theoretical guidance for the fabrication of high-performance beam deflection gratings in the future.
- gratings,
- beam deflection,
- transmission beam,
- non-periodic

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References

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