Nano-cylindrical hole metamaterials for high-efficiency ultra-bandwidth two-dimensional diffraction

Huang, Zhisen; Wang, Bo

doi:10.1016/j.optmat.2022.112065

Cited by 9 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several methods can be used for the grating optimization, such as Finite-DifferenceTime-Domain (FDTD), Finite Element Method (FEM) and Rigorous Coupled Wave Analysis (RCWA) [28,30,39,40]. The proposed gratings are optimized by the software FDTD Solutions (Lumerical Inc., CA).…”

Section: Grating Optimizationmentioning

confidence: 99%

“…However, the uniformity of diffraction efficiency is to be improved [22]. Recently, in reported 2D grating-based splitters under oblique incidence [23,24] and normal incidence [12,[25][26][27][28][29][30][31], high diffraction efficiency and great uniformity are of great concern, which is crucial to the signal quality. The Au covered crossgrating with high efficiency and polarization insensitivity has once been reported.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-efficiency polarization-selective two-dimensional diffraction gratings based on silver cuboid arrays

Zou,

Fang,

Liu

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

A two-dimensional (2D) diffraction grating based on silver cuboid arrays is demonstrated. With the structural optimization by three-dimensional (3D) finite-difference time-domain method, the proposed grating exhibits favorable polarization selectivity. At wavelength 1550 nm, high diffraction efficiency and polarization correlation can be realized in the case of two-port output ((0, ±1) or (±1, 0)) under TE polarization, as well as five-port output ((0, 0), (0, ±1) and (±1, 0)) under TM polarization. Under the two-port output state, the diffraction efficiency is nearly 48% with the extinction ratio of 16.44 dB and insertion loss of 0.20 dB. Under the five-port output status, the efficiency is larger than 19% for each diffraction order, meanwhile, the total efficiency and uniformity are 97% and 0.58 %, respectively. The proposed grating with positive implications has good potentials in polarization multiplexing and polarization-correlated grating interferometry.

show abstract

Section: Grating Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-efficiency polarization-selective two-dimensional diffraction gratings based on silver cuboid arrays

Zou,

Fang,

Liu

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Artificial electromagnetic metamaterials are artificial composite materials composed of subwavelength structural units, which have electromagnetic properties not found in natural materials [1][2][3]. Optical metamaterial absorbers (OMAs), one of the essential branches of electromagnetic metamaterials, have rapidly become a research hotspot because of their ultra-high absorption response properties to electromagnetic waves [4].…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Luo,

Li,

2023

Phys. Scr.

View full text Add to dashboard Cite

In this paper, an ultra-wideband solar absorber consisting of a four-layer structure of Al2O3-TiN-Al2O3-Ti is proposed. The proposed absorber achieves an average absorption of 97.85% in the wavelength range of 250-2000 nm (49.96% improvement over the reference planar structure), and its bandwidth of absorption over 90 % is even as high as 1742 nm. As a result of the symmetrical design of the structure, the absorber has polarization insensitivity and wide-angle absorption characteristics. In particular, the absorber has a large process tolerance in the structural parameters and a high degree of universality for other metals and dielectric materials, which is highly advantageous in manufacturing. In addition, we explored the reasons for the high absorption of the structure in detail, discussed the influence of different structures on the absorption, and analyzed the absorption characteristics and thermal conversion efficiency of the structure under the solar spectrum. The proposed structure provides a broader bandwidth and higher light absorption than the recently reported work and further reduces the structure's thickness. Therefore, the absorber will have broad application prospects in photothermal conversion, solar cells, imaging, and stealth.

show abstract

“…Multi-port beam splitters have been proven to be well applied to improve the speed of optical communication. In recent years, various multi-port output beam splitters have been proposed, such as even-port beam splitter [6][7][8][9], odd-port output beam splitter [10][11][12], and polarization selective beam splitter [13,14]. Among them, the three-port beam splitter has the features of simple structure and large manufacturing tolerance, so it is widely used in pulse detection [15], sensors [16][17][18][19][20][21], signal processing [22][23][24], and photonic crystal fabrication [25,26].…”

Section: Introductionmentioning

confidence: 99%

Microstructural characteristics of sandwiched T-shaped metamaterials for three-port splitting

Liang¹,

Wang²

2022

Laser Phys.

View full text Add to dashboard Cite

This paper presents a polarization-insensitive sandwiched three-port beam splitting grating at normal incidence. The grating adopts a sandwiched structure. Based on the rigorous coupled-wave analysis (RCWA) and the simulated annealing algorithm, the grating parameters are optimized to obtain the diffraction efficiencies of 32.83% at 0th order and 32.87% at ±1st orders for transverse electric polarization, and 32.63% at 0th order and 32.39% at ±1st orders for transverse magnetic polarization. Meanwhile, the calculation results of the finite element method are in general agreement with those of RCWA. In addition, the analysis results of grating period, duty cycle, and wavelength bandwidth further demonstrate the good wavelength bandwidth of the grating and its feasibility for practical production. Therefore, the grating can be widely used in actual production.

show abstract

Nano-cylindrical hole metamaterials for high-efficiency ultra-bandwidth two-dimensional diffraction

Cited by 9 publications

References 30 publications

High-efficiency polarization-selective two-dimensional diffraction gratings based on silver cuboid arrays

High-efficiency polarization-selective two-dimensional diffraction gratings based on silver cuboid arrays

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Microstructural characteristics of sandwiched T-shaped metamaterials for three-port splitting

Contact Info

Product

Resources

About