Experimental study is made of the relationship between the imaginary part of refractive index (IRI) of atmospheric aerosol particles and relative humidity,and between IRI and chemical element through the assay of chem...Experimental study is made of the relationship between the imaginary part of refractive index (IRI) of atmospheric aerosol particles and relative humidity,and between IRI and chemical element through the assay of chemical constituents of the particles.Evidence suggests that atmospheric humidity and aerosols' chemical ingredients have great effects on the IRI's and they should thus be considered in the research of the radiation properties of the particles in the atmosphere.展开更多
Radiation properties of high-order harmonic generation(HHG) are calculated for atoms in a strong laser field.The laser-duration dependence and the carrier-envelope-phase(CEP) dependence of HHG radiation properties are...Radiation properties of high-order harmonic generation(HHG) are calculated for atoms in a strong laser field.The laser-duration dependence and the carrier-envelope-phase(CEP) dependence of HHG radiation properties are presented.The CEP dependence of the pure single distribution pulse of HHG radiation properties shows interesting 180° periodic structures.The quantum enhancement of the laser-assisted photo-ionization by femtosecond(1 fs=10-15 s) and attosecond(1 as=10-18 s) X-ray pulses and the interference patterns of photo-electron energy spectra are theoretically investigated.Transfer equations are presented for pulse reconstructions.The theoretical root-mean-square time(energy) differences of attosecond pulse reconstructions with different durations are less than 2 as(0.8 eV).These methods may be developed as basic techniques to access ultra-fast measurements and molecular movie.展开更多
基金sponsored by the National Natural Science Foundation of China(Grant 40375003)
文摘Experimental study is made of the relationship between the imaginary part of refractive index (IRI) of atmospheric aerosol particles and relative humidity,and between IRI and chemical element through the assay of chemical constituents of the particles.Evidence suggests that atmospheric humidity and aerosols' chemical ingredients have great effects on the IRI's and they should thus be considered in the research of the radiation properties of the particles in the atmosphere.
基金Supported by the National Natural Science Foundation of China(Grant No.10675014)
文摘Radiation properties of high-order harmonic generation(HHG) are calculated for atoms in a strong laser field.The laser-duration dependence and the carrier-envelope-phase(CEP) dependence of HHG radiation properties are presented.The CEP dependence of the pure single distribution pulse of HHG radiation properties shows interesting 180° periodic structures.The quantum enhancement of the laser-assisted photo-ionization by femtosecond(1 fs=10-15 s) and attosecond(1 as=10-18 s) X-ray pulses and the interference patterns of photo-electron energy spectra are theoretically investigated.Transfer equations are presented for pulse reconstructions.The theoretical root-mean-square time(energy) differences of attosecond pulse reconstructions with different durations are less than 2 as(0.8 eV).These methods may be developed as basic techniques to access ultra-fast measurements and molecular movie.
