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