Two-photon coincident-frequency entanglement via extended phase matching -: art. no. 083601

被引：92
|
作者：
Kuzucu, O [1 ]
Fiorentino, M [1 ]
Albota, MA [1 ]
Wong, FNC [1 ]
Kärtner, FX [1 ]
机构：
[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.94.083601
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We demonstrate a new class of frequency-entangled states generated via spontaneous parametric down-conversion under extended phase-matching conditions. Biphoton entanglement with coincident signal and idler frequencies is observed over a broad bandwidth in periodically poled KTiOPO4. We demonstrate high visibility in Hong-Ou-Mandel interferometric measurements under pulsed pumping without spectral filtering, which indicates excellent frequency indistinguishability between the down-converted photons. The coincident-frequency entanglement source is useful for quantum information processing and quantum measurement applications.
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页数：4
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