Tailoring chiral optical properties by femtosecond laser direct writing in silica  

作　　者：Jiafeng Lu Jing Tian Bertrand Poumellec Enrique Garcia-Caurel Razvigor Ossikovski Xianglong Zeng Matthieu Lancry 

机构地区：[1]Institut de Chimie Moléculaire et des Matériaux d’Orsay,UniversitéParis Saclay,Orsay,91405,France [2]Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai Institute for Advanced Communication and Data Science,Shanghai University,Shanghai,200444,China [3]LPICM,CNRS,Ecole Polytechnique,Institut Polytechnique de Paris,Palaiseau,91128,France

出　　处：《Light(Science & Applications)》2023年第3期366-378,共13页光（科学与应用)（英文版）

基　　金：Agence Nationale pour la Recherche,FLAG-IR project,grant number ANR-18-CE08-0004-01;d CNRS Défi Instrumentation aux Limites,UltraBragg project,Science and Technology Commission of Shanghai Municipality(20JC1415700);Jiafeng Lu acknowledges the China Scholarship Council(CSC)for the funding No.202006890077;We greatly acknowledge Dr.Maxime Cavillon for valuable discussions.

摘　　要：An object that possesses chirality,that is,having its mirror image not overlayed on itself by rotation and translation,can provide a different optical response to a left-or right-handed circular polarized light.Chiral nanostructures may exhibit polarization-selective optical properties that can be controlled for micro-to-nano optical element engineering.An attractive way to induce such complex nanostructures in three-dimension in glass is femtosecond laser direct writing.However,the mechanism of femtosecond laser induced chirality remains to be unveiled due to complex physical and chemical processes occurring during the ultrashort light-matter interaction.Here,a phenomenological model is proposed and is built on two-layers phase shifters to account for this laser-induced optical chirality in an initially achiral material(silica glass).This model is based on the observation that femtosecond laser induced nanogratings own two principal contributions to its aggregate birefringent response:a form and a stress-related one.By refining this formalism,a multilayer approach is developed to imprint on demand optical rotation.Values up to+/-60°at 550 nm within an optimal 80μm thickness in silica glass are possible,corresponding to the highest value in a glass to date.These results provide new insights of circular-optical control in micro-nano optical manufacturing and open new opportunities for photonics applications.

关 键 词：polarization SILICA CIRCULAR 

分 类 号：TN24[电子电信—物理电子学]