The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.Th...The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.The high visibility of the interference is restored with narrow band interference filters placed in front of the detectors.展开更多
The plasmon waveguide based on double chain of gold cylinders is studied using the finite-difference time-domain method （FDTD）. The wavelength of the incident Gaussian beam ranges from 650 to 1200nm, and the corresp...The plasmon waveguide based on double chain of gold cylinders is studied using the finite-difference time-domain method （FDTD）. The wavelength of the incident Gaussian beam ranges from 650 to 1200nm, and the corresponding attenuation factors are calculated. We also present a Y-splitter with 90° splitting angle, each branch in the form of double chains. The transmission efficiencies for different wavelengths are evaluated.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19874056the National Natural Science Foundation for Youth of China under Grant No.69907005。
文摘The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.The high visibility of the interference is restored with narrow band interference filters placed in front of the detectors.
基金Supported by the National Basic Research Programme of China under Grant No 2006CB921900, the National Natural Science Foundation of China under Grant No 10604052, the Programme for New Century Excellent Talents in University, the Knowledge Innovation Project of Chinese Academy of Sciences under Gait No KGCX2-YW-103, the Programme of the Education Department of Anhui Province under Grant No 2006kj074A, the China Postdoctoral Science Foundation of China under Grant No 20060400205, the K. C. Wong Education Foundation of Hong Kong.
文摘The plasmon waveguide based on double chain of gold cylinders is studied using the finite-difference time-domain method （FDTD）. The wavelength of the incident Gaussian beam ranges from 650 to 1200nm, and the corresponding attenuation factors are calculated. We also present a Y-splitter with 90° splitting angle, each branch in the form of double chains. The transmission efficiencies for different wavelengths are evaluated.
