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Theoretical and Experimental study on Attosecond high-order Harmonics Radiation at SIOM
Ruxin Li,Xinhua Xie,Zhinan Zeng,Zhizhan Xu 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.32
Phase-matched high-order harmonic generation in an Ar gas-lled cell was investigated experimentally. We found that the spatial prole of high-order harmonics under the phase-matching condition was quite dierent from that of the phase-mismatching case. Also, the scheme of highintensity attosecond high-order harmonic generation driven by a synthesized laser eld is proposed. This new scheme provides a possible approach for producing a high-energy attosecond XUV pulse, which is useful for nonlinear attosecond spectroscopy.
Coherent Quantum Control of Atomic and Molecular Processes by Using the Technique of Laser Pulses
hangqing Gong,Ruxin Li,hiqi Jin,Xiaohong ong,Yueping Niu,Zhizhan Xu 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
Several schemes for coherent quantum control of atomic and molecular processes have been proposed and investigated by using the techniques of adiabatic passage and ultrashort pulses, respectively. Some interesting results have been found.
Kim, Byunghoon,An, Jungkwen,Yu, Yongli,Cheng, Ya,Xu, Zhizhan,Kim, Dong Eon The Optical Society 2008 Optics express Vol.16 No.14
<P>The effect of the mixing of pulsed two color fields on the generation of an isolated attosecond pulse has been systematically investigated. One main color is 800 nm and the other color (or secondary color) is varied from 1.2 to 2.4 microm. This work shows that the continuum length behaves in a similar way to the behavior of the difference in the square of the amplitude of the strongest and next strongest cycle. As the mixing ratio is increased, the optimal wavelength for the extended continuum shifts toward shorter wavelength side. There is a certain mixing ratio of intensities at which the continuum length bifurcates, i.e., the existence of two optimal wavelengths. As the mixing ratio is further increased, each branch bifurcates again into two sub-branches. This 2D map analysis of the mixing ratio and the wavelength of the secondary field easily allows one to select a proper wavelength and the mixing ratio for a given pulse duration of the primary field. The study shows that an isolated sub-100 attosecond pulse can be generated mixing an 11 fs full-width-half-maximum (FWHM), 800 laser pulse with an 1840 nm FWHM pulse. Furthermore the result reveals that a 33 fs FWHM, 800 nm pulse can produce an isolated pulse below 200 as, when properly mixed.</P>
Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching
Zhang, Zhijun,Li, Wentao,Liu, Jiansheng,Wang, Wentao,Yu, Changhai,Tian, Ye,Nakajima, Kazuhisa,Deng, Aihua,Qi, Rong,Wang, Cheng,Qin, Zhiyong,Fang, Ming,Liu, Jiaqi,Xia, Changquan,Li, Ruxin,Xu, Zhizhan American Institute of Physics 2016 Physics of plasmas Vol.23 No.5