High efficient Al: ZnO based bifocus metalens in visible spectrum

doi:10.1088/1674-1056/abab70

中国物理B ›› 2020, Vol. 29 ›› Issue (10): 104211-.doi: 10.1088/1674-1056/abab70

Pengdi Wang(王鹏迪)¹, Xianghua Zeng(曾祥华)¹^,²^,†()

收稿日期:2020-04-02 修回日期:2020-06-21 接受日期:2020-08-01 出版日期:2020-10-05 发布日期:2020-10-05
通讯作者: Xianghua Zeng(曾祥华)

High efficient Al: ZnO based bifocus metalens in visible spectrum

Pengdi Wang(王鹏迪)¹ and Xianghua Zeng(曾祥华)^1,2,†

¹ College of Physics Science and Technology & Institute of Optoelectronic Technology, Yangzhou University, Yangzhou 225002, China
² College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China

Received:2020-04-02 Revised:2020-06-21 Accepted:2020-08-01 Online:2020-10-05 Published:2020-10-05
Contact: ^†Corresponding author. E-mail: xhzeng@yzu.edu.cn第一通讯作者
About author:
†Corresponding author. E-mail: xhzeng@yzu.edu.cn
* Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0403101).

摘要/Abstract

Abstract:

The optical components of the visible light band are widely used in daily life and industrial development. However due to the serious loss of light and the high cost, the application is limited. The broadband gap metasurface will change this situation due to its low absorption and high efficiency. Herein, we simulate a size-adjustable metasurface of the Al doped ZnO (AZO) nanorod arrays based on finite difference time domain method (FDTD) which can realize the conversion of amplitude polarization and phase in the full visible band. The corresponding theoretical polarization conversion efficiency can reach as high as 91.48% (450 nm), 95.27% (530 nm), and 91.01% (65 nm). The modulation of focusing wavelength can be realized by directly adjusting the height of the AZO nanorod. The designed half-wave plate and metalens can be applied in the imaging power modulation halfwave conversion and enriching the spectroscopy.

Key words: visible spectrum, Al doped ZnO, half-wave plate, metalens

中图分类号: (Optical elements, devices, and systems)

42.79.-e

42.79.Bh (Lenses, prisms and mirrors)

Pengdi Wang(王鹏迪), Xianghua Zeng(曾祥华). [J]. 中国物理B, 2020, 29(10): 104211-.

Pengdi Wang(王鹏迪) and Xianghua Zeng(曾祥华)†. High efficient Al: ZnO based bifocus metalens in visible spectrum[J]. Chin. Phys. B, 2020, 29(10): 104211-.

图/表 13

参考文献 34

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Wavelength	450	530	650
E_x (with structure)/π	20.321	17.601	14.939
E_x and E_y (without structure)/π	17.769	15.053	12.304
E_y (with structure)/π	19.125	16.446	13.802
Phase shift of E_x/π	2.552	2.548	2.635
Phase shift of E_y/π	1.356	1.393	1.498
Phase difference/π	1.196	1.155	1.137

Structure	FE of point 1	FE of point 2	NA of point 1	NA of point 2
S1	0.536	0.238	0.410	0.707
S2	0.606	0.273	0.430	0.725
S3	0.645	0.337	0.447	0.721

High efficient Al: ZnO based bifocus metalens in visible spectrum

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Structure	S1	S2	S3
Length (L)/nm	45	45	45
Width (W)/nm	90	90	90
Height (H)/nm	1400	1850	2600
I_x/nm	100	100	100
I_y/nm	100	100	100

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