作者单位: | [1]DepartmentofElectronicScienceandTechnology,Xi'anJiaotongUniversity,Xi'an710049 [2]DepartmentofPhysics,Universityo-fNorthTexas,Denton,POBox311427,TX76203-1427,USA [3]StateKeyLaboratoryofTransientOpticsandTechnology,Xi'anInstituteofOpticsandPrecisionMechanics,ChineseAcademyofSciences,Xi'an710068 [4]DepartmentofPhysics,UniversityofConnecticut,U-3046,Storrs,Connecticut06269,USA [5]DepartmentofElectronicScienceandTechnology,Xi'anJiaotongUniversity,Xi'an710049 |