Bi-directional &amp; multi-functional terahertz beam splitter with stacked configuration

Lin, Zefan; Wang, Bo; Huang, Zhisen

doi:10.1140/epjp/s13360-022-03311-4

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…1, the structure of the grating ridge is T-type, whose material is SiO2, and the grating substrate is made of SiO2 as well. To reflect the energy of incident light and reduce production costs, the grating reflection layer is selected as Al, and the thickness hm is 100 nm, which is the threshold at which the reflected energy no longer changes 29 . At the wavelength of 1550 nm, the refractive index n1 of SiO2 is 1.42 and the refractive index nm of Al is 1.58 to 15.66i.…”

Section: T-type Metal-based Structurementioning

confidence: 99%

“…To reflect the energy of incident light and reduce production costs, the grating reflection layer is selected as Al, and the thickness h m is 100 nm, which is the threshold at which the reflected energy no longer changes. 29 At the wavelength of 1550 nm, the refractive index n 1 of SiO 2 is 1.42 and the refractive index n m of Al is 1.58 to 15.66i. In addition, the grating groove is filled with air with a refractive index n 0 of 1.00.…”

Section: T-type Metal-based Structurementioning

confidence: 99%

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Polarization insensitivity induced for 1 × 9 splitter with T-type SiO2 grating ridge

Liang,

Wang,

Shi

et al. 2024

Opt. Eng.

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To reduce the polarization sensitivity, a T-type grating with the material SiO 2 is proposed on a reflective layer made of aluminum material. Based on structural parameters derived from rigorous coupled-wave analysis and simulated annealing, the described reflection beam splitter enables a nine-port separation under normal incidence. In addition, it demonstrates exceptional and uniform diffraction efficiency. For transverse electric polarization, the diffraction efficiencies of 0th, ±1st, ±2nd, ±3rd, and ±4th are 10.02%, 11.70%, 10.85%, 11.00%, and 10.03%, respectively. For transverse magnetic polarization, the diffraction efficiencies of 0th, ±1st, ±2nd, ±3rd, and ±4th are 12.54%, 10.13%, 9.51%, 10.46%, and 11.89%, respectively. The finite element technique is used to verify the diffraction efficiency values. In addition, a thorough analysis of the fabrication tolerance, wavelength bandwidth, and electromagnetic field dispersion is conducted. The outcome shows that the suggested grating structure has outstanding uniformity and efficiency, and these studies greatly enhance our knowledge of and progress toward the creation of the nine-port beam splitter. Consequently, there is a lot of room for the implementation of the suggested grating in multi-channel optical communication systems.

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Section: T-type Metal-based Structurementioning

confidence: 99%

Section: T-type Metal-based Structurementioning

confidence: 99%

Polarization insensitivity induced for 1 × 9 splitter with T-type SiO2 grating ridge

Liang,

Wang,

Shi

et al. 2024

Opt. Eng.

Self Cite

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show abstract

“…Beam splitters play a significant role in the field of modern optical devices 1 – 4 The types of beam splitters can be divided into even-port beam splitter gratings, 5 , 6 odd-port beam splitter gratings, 7 – 10 and polarization-selective beam splitter gratings 11 , 12 . Gratings with different structures can have diverse functions under varying operating bands, 13 , 14 and researchers have been devoted to studying them 15 …”

Section: Introductionmentioning

confidence: 99%

Structure and characterization of plus-shaped configuration for 1 × 4 splitter

Liang,

Wang

2023

Opt. Eng.

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A polarization-insensitive four-port beam splitter based on the plus-shaped ridge structure is introduced. The ridge of this grating is a plus-shaped resin material. Based on the rigorous coupled-wave analysis and the simulated annealing algorithm, the transmission efficiency of the zeroth order under TE polarization is 1.79%, and the efficiencies of 22.21%/22.19% for the ± first/± second orders are diffracted. Meanwhile, the transmission efficiency of the zeroth order under TM polarization is 0.13%, and the efficiencies of 23.25%/23.23% for the ± first/± second orders are diffracted. In addition, the diffraction efficiency of each order is computed while the wavelength, grating period, and duty cycle are varied around the optimized parameters. The study reveals that the grating has excellent tolerance and stability. Hence, it is inferred that plus-shaped ridge four-port grating exhibits promising potential for advancement in the field of lasers.

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Bidirectional trifunctional splitter with two sided microstructure

Liang,

Wang,

et al. 2024

Optics Communications

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Bi-directional & multi-functional terahertz beam splitter with stacked configuration

Cited by 5 publications

References 32 publications

Polarization insensitivity induced for 1 × 9 splitter with T-type SiO2 grating ridge

Polarization insensitivity induced for 1 × 9 splitter with T-type SiO2 grating ridge

Structure and characterization of plus-shaped configuration for 1 × 4 splitter

Bidirectional trifunctional splitter with two sided microstructure

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