Laboratoire LULI,CNRS,CEA,Ecole Polytechnique,UPMC,Univ.Paris 06 Sorbonne Universites,Institut Polytechnique de Paris,F-91128 Palaiseau Cedex,France;
Center for Applied Physics and Technology,Peking University,Beijing 100871,China;
China Academy of Engineering Physics,Mianyang,China;
Center for High Pressure Science and Technology Advanced Research,Shanghai,China;