Asymmetric two-dimensional diffraction grating via a vortex field in an inverted-Ytype atomic system  

作　　者：Duo Zhang Ke Wang Kunpeng Zhao Mei Wang Zhaoyu Sun 

机构地区：[1]School of Electrical and Electronic Engineering,Wuhan Polytechnic University,Wuhan 430023,China

出　　处：《Communications in Theoretical Physics》2024年第5期77-85,共9页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China (grant no. 12105210);the Knowledge Innovation Program of Wuhan-Basic Research (grant no. 2023010201010149)

摘　　要：We propose a theoretical scheme to realize a two-dimensional(2D)diffraction grating in a four-level inverted-Y-type atomic system coupled by a standing-wave(SW)field and a Laguerre-Gaussian(LG)vortex field.Owing to asymmetric spatial modulation of the LG vortex field,the incident probe field can be lopsidedly diffracted into four domains and an asymmetric 2D electromagnetically induced grating is created.By adjusting the detunings of the probe field and the LG vortex field,the intensities of the LG vortex field and the coherent SW field,as well as the interaction length,the diffraction properties and efficiency,can be effectively manipulated.In addition,the effect of the azimuthal parameter on the Fraunhofer diffraction of the probe field is also discussed.This asymmetric 2D diffraction grating scheme may provide a versatile platform for designing quantum devices that require asymmetric light transmission.

关 键 词：asymmetric diffraction grating standing-wave field Laguerre-Gaussian vortex field diffraction property 

分 类 号：O436.1[机械工程—光学工程]