Thermal light subwavelength diffraction using positive and negative correlations  

作　　者：孙鸣捷 何兴丹 李明飞 吴令安 

机构地区：[1]Department of Opto-Electronic Engineering,Beihang University [2]Laboratory of Optical Physics,Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences [3]Quantum Engineering Research Center,Beijing Institute of Aerospace Control Devices China Aerospace

出　　处：《Chinese Optics Letters》2016年第4期11-15,共5页中国光学快报（英文版）

基　　金：supported by the National Basic Research Program of China(No.2010CB922904);the National Natural Science Foundation of China (No.61307021);the China Scholarship Council (No.201306025016)

摘　　要：Ghost imaging and diffraction, inspired by the Hanbury Brown and Twiss effect, have potential in both classical and quantum optics regimes on account of their nonlocal characteristics and subwavelength resolution capabil- ity, and therefore have aroused particular interest. By extending the correspondence imaging scheme, we utilize the positive and negative intensity correlations in diffraction and perform subwavelength diffraction with pseudo-thermal light. In the experiment, a subwavelength （λ/2） resolution and a better signal-to-noise ratio （10.3% improvement） are simultaneously achieved. The scheme can be utilized as a complement to the existing ghost imaging scheme to improve image quality.Ghost imaging and diffraction, inspired by the Hanbury Brown and Twiss effect, have potential in both classical and quantum optics regimes on account of their nonlocal characteristics and subwavelength resolution capabil- ity, and therefore have aroused particular interest. By extending the correspondence imaging scheme, we utilize the positive and negative intensity correlations in diffraction and perform subwavelength diffraction with pseudo-thermal light. In the experiment, a subwavelength （λ/2） resolution and a better signal-to-noise ratio （10.3% improvement） are simultaneously achieved. The scheme can be utilized as a complement to the existing ghost imaging scheme to improve image quality.

关 键 词：Imaging techniques LIGHT Quantum optics Signal to noise ratio 

分 类 号：O431.2[机械工程—光学工程]