Photonic crystal broadband y-shaped 1 × 2 beam splitter inversely designed by genetic algorithm

Ke, Hang; Shi, Peng; Li, Peili; Shi, Wei

doi:10.1117/1.oe.62.6.065106

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…In 2023, Pengcheng Shi et al proposed a novel PhC 1×5 beam splitter [17], which can achieve different splitting ratios and a total transmittance higher than 95% within the bandwidth of 40nm. A PhC Y-shaped broadband 1×2 equal ratio beam splitter was proposed in the same year [18], and its transmittance is higher than 97.8% within the bandwidth of 1515~1587nm.…”

Section: Introductionmentioning

confidence: 99%

Photonic crystal broadband 1×N beam splitter with designable splitting ratio based on genetic algorithm

Ke,

Li,

Shi

et al. 2024

Preprint

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A novel broadband Y-shaped 1×N beam splitter based on two-dimensional photonic crystal is proposed in this paper. Firstly, a broadband 1×2 beam splitting structure with designable splitting ratio is proposed. The influence of the offset along the z-axis of the dielectric rods adjacent to the input and output waveguides, and the offset of the dielectric rods at the junctions on the broadband performance of the 1×2 splitting structure is studied. Then, based on the structure, the broadband 1×4 and 1×8 beam splitters with designable splitting ratio are proposed. According to the target of the specific performance, using genetic algorithm, the broadband 1×4 and 1×8 beam splitters with different splitting ratios can be inversely designed, which not only improves the optimization efficiency, but also achieves excellent broadband splitting performance. The results show that the 1×4 beam splitters proposed have the additional loss less than 0.352dB and the response time less than 0.2ps within 1515~1590nm. The 1×8 beam splitters proposed have the additional loss less than 0.382dB and the response time less than 0.3ps within 1519~1587nm. Due to the advantages of broad operating bandwidth, flexible design of splitting ratio, high transmittance and fast response speed, the proposed 1×N beam splitters have wide application prospects in the fields of photonic integrated circuits, passive optical net-work, etc. PACS: 42.79.Fm, 42.70.Qs, 42.82.Et

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Section: Introductionmentioning

confidence: 99%

Photonic crystal broadband 1×N beam splitter with designable splitting ratio based on genetic algorithm

Ke,

Li,

Shi

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Beam splitters have become integral components of modern optical devices, finding extensive applications in the teleportation of squeezed states, 1 photonic circuits, [2][3][4] optical communication, [5][6][7] displacement measurement, 8,9 nonreciprocal thermal emitter, [10][11][12] and optical sensing. 13,14 As an important type of beam splitter grating, multi-channel beam splitters have gained significant attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

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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Design of beam splitters by using double defect layered 1D quaternary photonic band gap structures

Banerjee

2024

J Opt

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Photonic crystal broadband y-shaped 1 × 2 beam splitter inversely designed by genetic algorithm

Cited by 5 publications

References 23 publications

Photonic crystal broadband 1×N beam splitter with designable splitting ratio based on genetic algorithm

Photonic crystal broadband 1×N beam splitter with designable splitting ratio based on genetic algorithm

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

Design of beam splitters by using double defect layered 1D quaternary photonic band gap structures

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