基于函数的冻结水柱双光子钩发生器设计  

Design of Function-based Frozen Water Cylinder Twin Photonic Hook Generator

作　　者：董雪莉 韩国霞 田一寒 胡可 于湘华[2] 展凯云 DONG Xueli;HAN Guoxia;TIAN Yihan;HU Ke;YU Xianghua;ZHAN Kaiyun(College of science,China University of Petroleum(East China),Qingdao 266580,China;State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China)

机构地区：[1]中国石油大学(华东)理学院,青岛266580 [2]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119

出　　处：《光子学报》2024年第11期83-91,共9页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61605251);中国科学院西部青年学者重大前沿项目(No.XAB2022Y013);西安光机所所级中心高端科学仪器国产化及核心部件开放基金(No.SJZ1-202406001)。

摘　　要：将数学中的函数思想引入到光子钩的器件设计中,以冻结水柱作为相变材料,以函数作为冰水边界设计了一种可调控双光子钩发生器。研究结果表明,通过改变冻结水柱的结构与函数系数可以实现对双光子钩特性参数的有效调控,产生的光子钩可以实现多次乃至大角度弯曲,有效长度最大可达17.43λ,弯曲角度最大可达44°。该设计通过函数系数有效地对微纳结构进行结构约束从而调控光子钩的特性参数,为光子钩的设计与研究提供了新的思路,同时也为光子钩在光操纵、生物医学等方面的应用提供借鉴。Photonic nanojet is a kind of highly focused subwavelength locally electromagnetic beam that is formed by the scattering of dielectric micro-particle on light field,when the symmetry of system that is composed of light field and micro-particle is broken,a kind of subwavelength locally curved beam is formed,photonic hook.It is featured by a sub-diffraction limit of half-height width and a much smaller radius of curvature than wavelength.Due to these excellent performance parameters,the photonic hook has broad application prospects in the field of optical imaging,optical manipulation and trapping.Since the concept of photonic hook was proposed,researchers have been exploring the factors influencing the effective length and bending angle of photonic hooks,such as the parameters related to the properties of the medium particles(e.g.,size,structure,material)and the characteristics of the light field.Among them,most studies focus on the exploration of the structure of the micro-particle,and many different structures have been developed,but the material of the micro-particle is a dielectric or an artificial material.The state of water cylinder is changed at freezing,so frozen water cylinder can be a phase change material.Using frozen water droplet as phase change materials and the ice-water interface as plane,the generation of time-domain self-bending photonic hook has attracted much attention.However,the generated photonic hook has a relatively small effective length and a small curvature.During the freezing process of water cylinder,the shape at the state transition does not have a quantitative model for description.This paper sets the functions as boundaries for the state transition of materials and introduces the idea of functions from mathematics into the device design of photonic hooks.A twin photonic hook generator is designed using frozen water cylinder as phase change materials and function surfaces as the ice-water boundary interface.The software COMSOL is used for simulation,and effective control of the chara

关 键 词：光子纳米射流 光子钩 相变材料 结构约束函数 

分 类 号：TN253[电子电信—物理电子学]