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Polarization manipulation on step-index composite polymer beam splitters for photonics circuitry
Noor Afsary1, Fariha Tasnim1, Md Omar Faruk Rasel1
1Physics Discipline, Khulna University, Khulna, 9208, Bangladesh.
Heliyon
|February 6, 2024
Summary
Researchers developed polymer composite beam splitters for photonic integrated circuits, achieving 99% efficiency and a 50:50 split ratio. Optimized designs minimize excess loss and crosstalk for polarized light applications.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Photonic integrated circuits (PICs) require efficient and reliable optical components.
- Polymer materials offer advantages for fabricating complex PIC structures.
- Beam splitters are fundamental components in PICs for signal manipulation.
Purpose of the Study:
- To design and analyze composite beam splitters using polymer materials for PICs.
- To achieve high output efficiency and a precise splitting ratio.
- To investigate and minimize polarization dependency and excess loss.
Main Methods:
- Utilized organic-inorganic hybrid polymer materials for composite beam splitters.
- Employed step-index (SI) core profiles.
- Designed and analyzed using the alternating direction implicit technique in Rsoft CAD BeamPROP solver.
Main Results:
- Achieved 99% output efficiency with a 50:50 splitting ratio.
- Demonstrated low excess loss of 0.014 dB for unpolarized light.
- Minimized excess loss to 0.05 dB and crosstalk to -19.77 dB at a 31-degree incident angle for polarized light.
Conclusions:
- Composite beam splitters fabricated with polymer materials are suitable for PICs.
- The design allows for efficient light splitting with manageable polarization effects.
- Further optimization of incident angles can significantly reduce losses and crosstalk.
