High-efficiency broadband blazed metagrating working in visible light

doi:10.1088/2040-8986/acac40

CIOMP OpenIR

	High-efficiency broadband blazed metagrating working in visible light
	Y. Lin; Y. Han; C. Wang; B. Li; J. Zhang and Y. Deng
	2023
发表期刊	Journal of Optics (United Kingdom)
ISSN	20408978
卷号	25 期号:2
摘要	A simple 1D blazed metagrating is proposed. The metagrating consists of SiO2 film sandwiched by Ag substrate and Ag nanostrips, which can achieve high-efficiency −1st-order diffraction in the range of 550 nm to 700 nm, and the peak efficiency is nearly 98%. The SiO2 dielectric layer in previous designs is used chiefly as a waveguide layer to support a guided mode. In comparison, it is introduced here to suppress the unwanted diffraction order (zero-order), which helps achieve high-efficiency diffraction at a high diffraction order. For analysis, the metagrating is disassembled into two parts, including a flat plate and a grating. By analysing the far-field radiation pattern of scattered waves and the reflection phase of a specific mode for these two parts, we conclude that the cause of high-efficiency blazing draws support from suppressing zero-order based on destructive interference. This work provides an intuitive physical image for this type of metagrating and an idea to design high-efficiency diffraction and beam deflection devices from the perspective of interference. © 2022 IOP Publishing Ltd
DOI	10.1088/2040-8986/acac40
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收录类别	sci ; ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67680
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	Y. Lin,Y. Han,C. Wang,et al. High-efficiency broadband blazed metagrating working in visible light[J]. Journal of Optics (United Kingdom),2023,25(2).
APA	Y. Lin,Y. Han,C. Wang,B. Li,&J. Zhang and Y. Deng.(2023).High-efficiency broadband blazed metagrating working in visible light.Journal of Optics (United Kingdom),25(2).
MLA	Y. Lin,et al."High-efficiency broadband blazed metagrating working in visible light".Journal of Optics (United Kingdom) 25.2(2023).

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