experimental demonstration
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2022 ◽  
Xingyi Li ◽  
Yuan Zhou ◽  
Suyang Ge ◽  
Guoxi Wang ◽  
siqi li ◽  

2022 ◽  
Vol 1 (1) ◽  
pp. 63
Aleksandr Shulga ◽  
Irina Shilova

2022 ◽  
Vol 13 (1) ◽  
Zi-Lan Deng ◽  
Tan Shi ◽  
Alex Krasnok ◽  
Xiangping Li ◽  
Andrea Alù

AbstractOptical skyrmions have recently been constructed by tailoring vectorial near-field distributions through the interference of multiple surface plasmon polaritons, offering promising features for advanced information processing, transport and storage. Here, we provide experimental demonstration of electromagnetic skyrmions based on magnetic localized spoof plasmons (LSP) showing large topological robustness against continuous deformations, without stringent external interference conditions. By directly measuring the spatial profile of all three vectorial magnetic fields, we reveal multiple π-twist target skyrmion configurations mapped to multi-resonant near-equidistant LSP eigenmodes. The real-space skyrmion topology is robust against deformations of the meta-structure, demonstrating flexible skyrmionic textures for arbitrary shapes. The observed magnetic LSP skyrmions pave the way to ultra-compact and robust plasmonic devices, such as flexible sensors, wearable electronics and ultra-compact antennas.

2022 ◽  
Sai Li ◽  
Ao Du ◽  
Yadong Wang ◽  
Xinran Wang ◽  
Xueying Zhang ◽  

2021 ◽  
Sitti Buathong ◽  
Sorakrai Srisuphaphon ◽  
Sarayut Deachapunya

Abstract In a prior report the optical vortex was characterized using the near-field Talbot effect [1, 2]. This near-field technique can resolve both order and charge of the orbital angular momentum state of the vortex beam. We have proposed before that a small open fraction of the grating in the Talbot configuration can improve the image contrast [3]. In this study, we combine these previously reported techniques, i.e. the Talbot effect for probing an optical vortex and overlapping gratings to manipulate the open fraction. Both theoretical simulation and experimental demonstration are presented here. We believe that our technique can be an alternative method for optical vortex imaging, and could be useful in optical applications.

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