Advances In Multi-photon Processes And Spectroscopy

CONTENTS......Page 6
Preface......Page 8
1.1. Introduction......Page 10
1.2. Probing Molecular Orbital Symmetry with Sub-10 fs Laser Pulses......Page 13
1.2.1. Molecular tunneling ionization theory......Page 14
1.2.2. Alignment dependence of tunneling ionization rates and the symmetry of molecular orbitals......Page 16
1.3.1. Dynamics of double ionization of H2 by femtosecond lasers......Page 21
1.3.2. Theory of double ionization of H2 by femtosecond lasers: rescattering region......Page 23
1.3.3. Control the time sequence of double ionization by tuning laser parameters......Page 27
1.4. Probing Nonclassical VibrationalWave Packets on Two Potential Surfaces......Page 30
1.5. Summary and Discussion......Page 34
References......Page 35
2.1. General Introduction......Page 38
2.2. Original Atomic Keldysh Theory......Page 43
2.3.1. Introduction......Page 52
2.3.2. Theory-atomic case......Page 53
2.3.3. Theory-diatomic molecule case......Page 55
2.3.4. Results and discussion......Page 58
2.4.1. Introduction......Page 65
2.4.2. Theory......Page 66
2.4.3. Results and discussion......Page 73
2.5.1. Introduction......Page 77
2.5.2.1. Molecular Coulomb-corrected Volkov function of electron......Page 80
2.5.2.2. Photoionization rate of spatially aligned molecules in the linearly polarized electric field......Page 83
2.5.4.1. Ab initio calculation......Page 89
2.5.4.2. Photoionization rates of all-trans polyacetylene radicals (CnHn+2, n = 3, 5, 7, 9, 13, 27)......Page 92
2.6.2. Theory......Page 105
2.6.3.2. Calculation of Franck–Condon factors......Page 117
2.6.4. Numerical results and discussion......Page 120
2.6.5. Introduction......Page 131
2.6.6. Theory......Page 132
2.6.7.1. Ab initio calculation......Page 137
2.6.7.2. Calculation of potential energy curves and Franck–Condon factors......Page 138
2.6.8. Numerical results and discussion......Page 139
2.7. Towards the Realization of the Quantum Chemistry Approach to Tunneling Photoionization Processes in Strong Laser Fields......Page 147
2.8. Ab Initio/RRKM Approach to the Elucidation of the Mechanism of Photoionization and Photodissociation of Molecules in Intense Laser Fields......Page 151
2.9. Conclusion......Page 153
Appendix A. Saddle-Point Method for Integrals with a Singularity......Page 156
Appendix B. Compact Forms of L(p) Defined by Eq. (64)......Page 158
Appendix C. Definition of N(r, w, I0, I0, B,C) in Eqs. (66) and (79)......Page 159
Appendix D. Definition of N(r,r,w, I0, A, B) and Integrated Form of Eq. (121)......Page 160
Appendix E. Photoionization Rates in the First-Order Coulomb Correction......Page 162
Appendix F......Page 164
Appendix G......Page 166
Appendix H......Page 172
Appendix I. Derivation of the Quantum Interference Terms......Page 175
Appendix J. Definitions of the Terms in Eq. (214)......Page 177
Appendix K. Total Photoionization Rate with the Perpendicular Polarization under the Non-Condon Approximation......Page 178
Appendix L. Quantum Interference Terms......Page 180
References......Page 182
3 Ionization and Fragmentation of Some Organic Molecules with Intense Femtosecond Laser Pulses Nobuaki Nakashima, Tomoyuki Yatsuhashi, Masanao Murakami, Ryuji Mizoguchi and Yoshinori Shimada......Page 188
3.1. Introduction......Page 189
3.2.1. Femtosecond laser......Page 191
3.2.2. Intensity evaluation by measuring the focusing diameter......Page 193
3.2.3. Intensity evaluation based on an intensity standard......Page 195
3.2.4. Time-of-Flight (TOF) mass spectrometer......Page 198
3.3.1. Schematic diagram......Page 199
3.3.2. Estimation of the order of intensity of molecular ionization......Page 201
3.4.1. Resonance versus non-resonance......Page 203
3.4.2. Molecular ion formation from dienes......Page 204
3.4.3. Wavelength dependence of 2,3-dimethyl-1,3-butadiene......Page 206
Anthracene......Page 207
Biphenyl......Page 208
Dibenzofuran......Page 209
Comments on C60 Ionization......Page 211
3.4.5. Pulse width dependence......Page 215
3.4.6. Electron rescattering......Page 217
3.4.7. Comparison with electron impact excitation spectra......Page 219
3.5.1. FLMS and dioxins......Page 221
3.5.2. Trichlorodioxins......Page 222
References......Page 225