Polarization-independent and high-efficiency 2D dielectric transmission grating under Littrow incidence

IF 3.2 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2024-09-18 DOI:10.1364/oe.537907
Mingle Qiao, Yongfang Xie, Shihao Kang, Jin Wang, Changhe Zhou
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引用次数: 0

Abstract

In this paper, a transmission two-dimensional (2D) all-dielectric grating with cuboid arrays is proposed, which has high diffraction efficiency and good polarization independence under Littrow mounting conditions at an incident wavelength of 780 nm. The optimization results indicate that when the incident wavelength is 780 nm, the diffraction efficiency of the (−1, 0) order of transverse electric (TE) and transverse magnetic (TM) polarizations can reach 98.62% and 98.23%, respectively, with the polarization-dependent loss (PDL) of 0.017 dB. To the best of our knowledge, high-efficiency polarization-independent 2D transmission grating with a simpler and more effective structure is proposed for the first time, which demonstrates significant enhancements in bandwidth and manufacturing tolerances while maintaining high diffraction efficiency. The results suggest that the grating has great potential for applications in high-precision displacement measurements such as grating interferometers.
利特罗入射条件下与偏振无关的高效二维介质透射光栅
本文提出了一种具有立方体阵列的透射二维(2D)全介质光栅,在入射波长为 780 nm 的利特罗安装条件下,该光栅具有较高的衍射效率和良好的偏振无关性。优化结果表明,当入射波长为 780 nm 时,横向电(TE)和横向磁(TM)极化的(-1,0)阶衍射效率分别可达 98.62% 和 98.23%,极化相关损耗(PDL)为 0.017 dB。据我们所知,这是首次提出结构更简单、更有效的高效偏振无关二维传输光栅,在保持高衍射效率的同时,显著提高了带宽和制造公差。研究结果表明,该光栅在光栅干涉仪等高精度位移测量领域具有巨大的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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