Broadband High-Efficiency Gratings Operating at the 2nd Order Designed by Simplified Modal Method

Yin, Zhengkun; Yu, Junjie; Lu, Yuanfu; Zhou, Changhe

doi:10.1109/lpt.2020.2972749

Cited by 13 publications

(4 citation statements)

References 21 publications

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“…In order to maximize the diffraction efficiency of the (−1, 0) diffraction order under TE and TM polarizations, the grating parameters (h 1 , h 2 , h 3 , d, f ) are selected for optimization. Simultaneously, the optimal solution is filtered by the simulated annealing algorithm [33], which can greatly improve the efficiency of the optimization. The optimized structural parameters are h 1 = 606 nm, h 2 = 492 nm, h 3 = 502 nm, d = 1526 nm and f = 0.607.…”

Section: Investigations and Resultsmentioning

confidence: 99%

Two-dimensional grating metasurface for communication band under Littrow mounting

Zhu,

Wang

2024

J. Phys. D: Appl. Phys.

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For communication, it is important to reduce the polarization-independence loss, especially for the stereoscopic incidence. A two-dimensional (2D) grating with the cylindrical hole (CDH) array is presented. The grating structure can achieve polarization-independent, high-efficiency and broadband output at the (-1, 0) diffraction order in the communication band. The novel metasurface achieves a diffraction efficiency of over 98% for both TE and TM polarizations at the (-1, 0) diffraction order. In addition, the (0, 0) diffraction order is well suppressed, resulting in extinction ratio of 43.89 dB and 46.18 dB for TE and TM polarization, respectively. In particular, the diffraction efficiency of the structure at the (-1, 0) order of magnitude under two polarizations exceeds 90% in the 1533-1561 nm bandwidth, which is a significant improvement over recently reported 2D gratings of the same type. Furthermore, the proposed structure has good incidence angle bandwidth and fabrication process tolerance, which ensures stable and efficient output in applications and fabrication. These results enrich the research on 2D gratings in the field of communication bands, and the designed grating has great potential for applications in spectroscopy, grating measurement and interferometry.

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Section: Investigations and Resultsmentioning

confidence: 99%

Two-dimensional grating metasurface for communication band under Littrow mounting

Zhu,

Wang

2024

J. Phys. D: Appl. Phys.

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“…The grating structure was made up of rectangular Multilayer-dielectric-film gratings are simpler to create than polarization-independent broadband gratings, and they have a higher efficiency than single-layer dielectric film gratings. Z. Yin, J. Yu, et al [60] created a broadband high-efficiency three-layer all-dielectric rectangular-slot transmission grating with −2 order Bragg incidence in 2020. The three layer structures are composed of Al 2 O 3 , TiO 2 , and SiO 2 .…”

Section: Multilayer Dielectric Film Transmission Gratingmentioning

confidence: 99%

The Development Progress of Surface Structure Diffraction Gratings: From Manufacturing Technology to Spectroscopic Applications

Wang

Chen

et al. 2022

Applied Sciences

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The high-precision diffraction grating is an important chromatic dispersion component that has been widely used in many fields, including laser beam combining, chirped pulse compression, spectroscopy, among others. In this paper, we review the development status of reflection and transmission gratings with high diffraction efficiency and high laser-induced damage thresholds, such as metal-film and multilayer-dielectric-film gratings. Then, we review the basic principles and most recent stages in the development of manufacturing techniques, such as mechanical scribing, holographic exposure, electron-beam lithography, and nanoimprinting.

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“…At the same time, the above structural parameters are optimized by simulated annealing (SA) algorithm to quickly find the highest diffraction efficiency at two polarizations. SA algorithm is a fast and effective optimization technique to find global solutions by skipping a certain probability of local minima [42]. The optimized structural parameters are h 1 =102 nm, h 2 =495 nm, h 3 =558 nm and f = 0.52.…”

Section: Parameter Optimization and E-field Distributionmentioning

confidence: 99%

Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

Huang¹,

Wang²

2021

Phys. Scr.

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In this paper, a two-dimensional (2D) reflective grating with nanodisks arrays (NDA) is described, which is capable of achieving high-efficiency and polarization-insensitive output of (−1, 0) order. The proposed grating has been optimized by the finite element method (FEM) at a central wavelength of 780 nm under Littrow mounting, where the grating achieves diffraction efficiencies of 98.01% and 97.54% at the (−1, 0) order for transverse electric (TE) and transverse magnetic (TM) polarizations, respectively. In addition, the extinction ratios of TE and TM polarizations are 33.01 dB and 35.74 dB, respectively. The electric field distribution, wavelength bandwidth, angular bandwidth and fabrication tolerance of the 2D grating are analyzed in detail. The analysis shows that the proposed grating offers a significant improvement in wavelength (bandwidth of 14 nm) and angular (bandwidth of 6.4°) bandwidths compared to previously reported 2D gratings. At the same time, the tolerance analyses demonstrate the feasibility and advantages of NDA grating in practical manufacturing processes. The results are very helpful in understanding and designing 2D gratings, and the proposed grating has great application potential in 2D grating measurement system (GMS).

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Broadband High-Efficiency Gratings Operating at the 2nd Order Designed by Simplified Modal Method

Cited by 13 publications

References 21 publications

Two-dimensional grating metasurface for communication band under Littrow mounting

Two-dimensional grating metasurface for communication band under Littrow mounting

The Development Progress of Surface Structure Diffraction Gratings: From Manufacturing Technology to Spectroscopic Applications

Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

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