Super-bunched focusing with chirped random-phase gratings  

作　　者：LU ZHANG DONGXU ZHOU YIPING LU HONGZHI ZHANG GUOQUAN ZHANG 

机构地区：[1]MOE Key Laboratory of Weak-Light Nonlinear Photonics,School of Physics and TEDA Applied Physics Institute,Nankai University,Tianjin 300457,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Photonics Research》2020年第4期503-510,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(91750204,11774182,61475077);Higher Education Discipline Innovation Project(B07013);Fundamental Research Funds for the Central Universities。

摘　　要：Chirped random-phase gratings are designed to produce experimentally a super-bunched focusing effect with a high bunching peak value of g(2)(0)=15.38±0.05 and a high visibility of 92.5%,greatly surpassing the theoretical bunching peak of 2 of thermal light.Both slit-width-chirped and period-chirped random-phase gratings are studied theoretically and experimentally.The full width at half-maximum of the super-bunched curve decreases significantly with an increase in the slit number,focusing the photon pairs within a decreasing spot size.This super-bunched focusing effect can be useful for improving the resolution and the visibility of the correlation image simultaneously.

关 键 词：Super-bunched CHIRPED random-phase GRATINGS 

分 类 号：O43[机械工程—光学工程]