Generation of subwavelength inverted pin beam via fiber end integrated plasma structure  

作　　者：Zhengchuan Cai Zhiqiang Quan Libo Yuan Jian Wang Houquan Liu 

机构地区：[1]Guilin University of Electronic Technology,Photonics Research Center,School of Optoelectronic Engineering,Guilin,China [2]Guilin University of Electronic Technology,Guangxi Key Laboratory of Optoelectronic Information Processing,Guilin,China [3]Huazhong University of Science and Technology,Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information,Wuhan,China [4]Optics Valley Laboratory,Wuhan,China

出　　处：《Advanced Photonics Nexus》2024年第2期18-25,共8页先进光子学通讯（英文）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.62205079,62065006,62125503,and 62261160388);the Natural Science Foundation of Hubei Province of China (Grant No.2023AFA028);the Innovation Project of GUET Graduate Education (Grant No.2023YCXS214);the Innovation Project of Optics Valley Laboratory (Grant No.OVL2021BG004).

摘　　要：A pin-like beam is a kind of structured light with a special intensity distribution that can be against diffraction,which can be seen as a kind of quasi-nondiffracting beam(Q-NDB).Due to its wide applications,recently,numerous researchers have used optical lenses or on-chip integrated optical diffractive elements to generate this kind of beam.We theoretically verify and experimentally demonstrate an all-fiber solution to generate a subwavelength inverted pin beam by integrating a simple plasma structure on the fiber end surface.The output beams generated by two kinds of plasma structures,i.e.,nanoring slot and nanopetal structure,are investigated and measured experimentally.The results show that both the structures are capable of generating subwavelength beams,and the beam generated using the nanopetal structure has the sidelobe suppression ability along the x-axis direction.Our all-fiber device can be flexibly inserted into liquid environments such as cell cultures,blood,and biological tissue fluids to illuminate or stimulate biological cells and molecules in them.It provides a promising fiber-integrated solution for exploring light–matter interaction with subwavelength resolution in the field of biological research.

关 键 词：iinverted pin beam fiber-integrated plasma structure subwavelength resolution 

分 类 号：TN2[电子电信—物理电子学]