Generation of sub-wavelength and super-resolution longitudinally polarized non-diffraction beam using lens axicon  

作　　者：K.B.Rajesh P.M.Anbarasan 

机构地区：[1]Department of Physics,Periyar University,Salem 636011,India

出　　处：《Chinese Optics Letters》2008年第10期785-787,共3页中国光学快报（英文版）

基　　金：the University Research Fellowship offered by Periyar University

摘　　要：It is well known that a light spot of sub-wavelength will diverge in all directions. In this letter, A method is presented for generating sub-wavelength （0.44λ） longitudinally polarized beam, which propagates without divergence over lengths of about 2λ in free space. This is achieved by a high numerical aperture （NA） lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line.It is well known that a light spot of sub-wavelength will diverge in all directions. In this letter, A method is presented for generating sub-wavelength （0.44λ） longitudinally polarized beam, which propagates without divergence over lengths of about 2λ in free space. This is achieved by a high numerical aperture （NA） lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line.

分 类 号：O436.3[机械工程—光学工程]