scholarly journals Mid-Infrared Polarization Beam Splitter based on Square/circular Hybrid Air Holes with Wide Bandwidth and Ultrashort Length

2021 ◽  
Author(s):  
Guangming Zheng
Keyword(s):  
Finite Element Method ◽  
Mode Coupling ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
The Finite Element Method ◽  
Wide Bandwidth ◽  
Mid Infrared ◽  
High Birefringence ◽  
Coupling Characteristics

Abstract A novel mid-infrared polarization beam splitter (PBS) based on GaS is proposed. The high birefringence is achieved by using the cladding structure of alternating arrangement of square and circular air holes as well as introducing double elliptical air holes. The finite element method (FEM) is utilized to investigate the mode coupling characteristics in the proposed PBS. The results show that the highest extinction ratio of 115 dB and shortest length of only 40 µm can be realized at a wavelength of 4 µm. A wide bandwidth of 200 nm ranging from 3.9µm to 4.1µm is obtained.

scholarly journals Compact Photonic Crystal Polarization Beam Splitter Based on the Self-Collimation Effect

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 198
Author(s):  
Geyu Tang ◽  
Huamao Huang ◽  
Yuqi Liu ◽  
Hong Wang
Keyword(s):  
Optical Communications ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarized Light ◽  
The Self ◽  
Polarization Beam Splitter ◽  
Optical Interconnection ◽  
Beam Splitting ◽  
Beam Splitters ◽  
Polarization Extinction Ratio

We propose a new compact polarization beam splitter based on the self-collimation effect of two-dimensional photonic crystals and photonic bandgap characteristics. The device is composed of a rectangular air holes-based polarization beam splitting structure and circular air holes-based self-collimating structure. By inserting the polarization beam splitting structure into the self-collimating structure, the TE and TM polarized lights are orthogonally separated at their junction. When the number of rows in the hypotenuse of the inserted rectangular holes is 5, the transmittance of TE polarized light at 1550 nm is 95.4% and the corresponding polarization extinction ratio is 23 dB; on the other hand, the transmittance of TM polarized light is 88.5% and the corresponding polarization extinction ratio is 37 dB. For TE and TM polarized lights covering a 100 nm bandwidth, the TE and TM polarization extinction ratios are higher than 18 dB and 30 dB, respectively. Compared with the previous polarization beam splitters, our structure is simple, the size is small, and the extinction ratio is high, which meets the needs of modern optical communications, optical interconnection, and optical integrated systems.

Ultra-high extinction-ratio polarization beam splitter with extreme skin depth waveguide

2021 ◽  
Author(s):  
Syed Ziauddin Ahmed ◽  
Ishtiaque Ahmed ◽  
Md Borhan Mia ◽  
Nafiz Jaidye ◽  
Sangsik Kim
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Skin Depth ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio

Broadband silicon polarization beam splitter with a high extinction ratio using a triple-bent-waveguide directional coupler

2017 ◽  
Vol 42 (21) ◽  
pp. 4450 ◽  
Author(s):  
Jun Rong Ong ◽  
Thomas Y. L. Ang ◽  
Ezgi Sahin ◽  
Bryan Pawlina ◽  
G. F. R. Chen ◽  
...  
Keyword(s):  
Directional Coupler ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio

scholarly journals Mode Conversion of the Edge Modes in the Graphene Double-Ribbon Bend

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4008
Author(s):  
Lanlan Zhang ◽  
Binghan Xue ◽  
Yueke Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Surface Plasmons ◽  
Mode Conversion ◽  
Infrared Range ◽  
The Finite Element Method ◽  
Edge Mode ◽  
Mid Infrared ◽  
Graphene Surface ◽  
Graphene Surface Plasmons

In this paper, a new kind of graphene double-ribbon bend structure, which can support two edge graphene surface plasmons (EGSPs) modes, is proposed. In this double-ribbon bend, one edge mode can be partly converted into another one. We attribute the mode conversion mechanism to the interference between the two edge plasmonic modes. Based on the finite element method (FEM), we calculate the transmission and loss of EGSPs propagating along this graphene double-ribbon bend in the mid-infrared range under different parameters.

scholarly journals High-extinction-ratio silicon polarization beam splitter with tolerance to waveguide width and coupling length variations

2016 ◽  
Vol 24 (6) ◽  
pp. 6586 ◽  
Author(s):  
Yong Zhang ◽  
Yu He ◽  
Jiayang Wu ◽  
Xinhong Jiang ◽  
Ruili Liu ◽  
...  
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
Coupling Length ◽  
High Extinction Ratio ◽  
Waveguide Width

High Extinction Ratio Polarization Beam Splitter Realized by Separately Coupling

2020 ◽  
Vol 32 (18) ◽  
pp. 1183-1186
Author(s):  
Chaoqun Niu ◽  
Zhi Liu ◽  
Xiuli Li ◽  
Xiangquan Liu ◽  
Fengshuo Wan ◽  
...  
Keyword(s):  
Beam Splitter ◽  
Extinction Ratio ◽  
Polarization Beam Splitter ◽  
High Extinction Ratio
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