Non-diffracting integer-order and half-integer-order carpet beams obtained by even-type sinusoidal amplitude radial gratings  

作　　者：Yefeng Liu Huiqing Li Rijian Chen Changjiang Fan Yile Shi Zhijun Ren 刘叶枫;黎慧青;陈日坚;范长江;施逸乐;任志君(Key Laboratory of Optical Information Detecting and Display Technology,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]Key Laboratory of Optical Information Detecting and Display Technology,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Chinese Optics Letters》2024年第7期86-92,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11974314 and 11674288).

摘　　要：In this work,we introduce a kind of new structured radial grating,which is named the even-type sinusoidal amplitude radial(ETASR)grating.Based on diffraction theory and the principle of stationary phase,a comprehensive theoretical investigation on the diffraction patterns of ETASR gratings is conducted.Theoretical results show that novel carpet beams with beautiful optical structures and distinctive characteristics have been constructed on the basics of the ETASR grating.Their diffraction patterns are independent of propagation distance,that is,the new carpet beams have diffraction-free propagating characteristics.The non-diffracting carpet beams are divided into two types by beam characteristics:non-diffracting integer-order and half-integer-order carpet beams.Subsequently,we experimentally generate these carpet beams using the ETASR grating.Finally,their particularly interesting optical morphology and features are explored through numerical simulations and experiments.

关 键 词：even-type sinusoidal amplitude radial gratings principle of stationary phase non-diffracting integer-order carpet beams non-diffracting half-integer-order carpet beams 

分 类 号：O43[机械工程—光学工程]