| Spatial Interference Effect of Two—Photon in Femtosecond—Pules Pumped Spontaneous Parametric Down—Conversion |
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| 作者姓名： | 陆书龙 孙宝权 等 |
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| 作者单位： | [1]NationalLaboratoryforSuperlatticesandMicrostructures,InstituteofSemiconductors,ChineseAcademyofSciences,P.O.Box912,Beijing100083 [2]NationalLaboratoryforSuperlatticesandMicrostructures,InstituteofSemicon |
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| 摘 要： | We have used the transverse correlated properties of the entangled photon pairs generated in the process of spontaneous parametric down-conversion,which is pumped by a femtosecond pulse laser,to perform Young‘s interference experiment.Unlike the case of a continuous wave laser pump,a broadband pulse laser pump can submerge an interference pattern.In order to obtain a high visibility interference pattern,we used a lens with a tunable focal length and two interference filters to eliminate the effects of the broadband pump laser.It is proven that the process of two-photon direct interference is a post-selection process.
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| 关 键 词： | 量子光学 双光子空间相干效应 交缠光子对 |
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