Effects of femtosecond laser parameters on state populations of three-level ladder molecule
GUO Wei1,2, FENG Xiaojing1
1. School of Electrical Engineering, University of South China, Hengyang 421001, China;
2. State Key Laboratory of Molecular Reaction Dynamics;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Abstract:The effects of the pump intensity, the wavelength and the pulse width on the state populations of the three-level ladder K2 molecule driven by intense femtosecond pump-probe pulses are investigated by employing the time-dependent wave packet approach and are thus quantified. The Rabi oscillation is affected by the pump intensity, the wavelength and the pulse width, and its variation results in a periodical change of the populations in the ground state and the excited state. Quantifying their effects on the population of the excited state verifies the periodical nature and shows that the frequency varies with the increasing pump intensity and pulse width. The results illustrate that the needed population in the electronic state of interest can be obtained by controlling these parameters, which provides some important basis for light manipulation of molecular processes.
[1] Magnier S, Persico M, Rahman N. Rabi oscillations between dissociative molecular states[J]. Physical Review Letters, 1999, 83(11):2159-2162.
[2] Malinovskaya S A, Malinovsky V S. Chirped-pulse adiabatic control in coherent anti-Stokes Raman scattering for imaging of biological structure and dynamics[J]. Optics Letters, 2007, 32(6):707-709.
[3] 王荣, 修俊玲, 牛英煜. 利用多光子跃迁控制基态HF分子布居转移[J]. 物理学报, 2013, 62(9):93301. Wang Rong, Xiu Junling, Niu Yingyu. Population transfer of HF molecules in the ground electronic state through multiphoton transition[J]. Acta Physica Sinica, 2013, 62(9):93301.
[4] Yan Tianmin, Han Yongchang, Yuan Kaijun, et al. Steering population transfer via continuum structure of the Li2 molecule with ultrashort laser pulses[J]. Chemical Physics, 2008, 348(1):39-44.
[5] Wollenhaupt M, Assion A, Bazhan O, et al. One-parameter control of quantum dynamics using femtosecond pump-probe photoelectron spectroscopy on a model system[J]. Applied Physics B, 2002, 74(1):s121-s125.
[6] Yuan Kaijun, Wang Senming, Cong Shulin. Controlling population transfer and dissociation rate of Na2 molecules with Ultra-Short intense laser pulses[J]. Chinese Physics Letters, 2005, 22(10):2534-2537.
[7] Yuan Kaijun, Wang Senming, Sun Zhigang, et al. Selective vibrational population transfer between electronic states of the Na2 molecule with ultrashort laser pulses[J]. Chemical Physics, 2006, 326(2):605-610.
[8] Han Yongchang, Wang Senming, Yuan Kaijun, et al. Population transfer of the Na2 molecule via continuum state[J]. Chemical Physics, 2007, 333(2):119-127.
[9] Yao Hongbin, Zheng Yujun. Quantum control of a molecular system in an intense field via the selective population of dressed states[J]. Physical Chemistry Chemical Physics, 2011, 13(19):8900-8907.
[10] Yao Hongbin, Zheng Yujun. Autler-Townes splitting in photoelectron spectra of K2 molecule[J]. Chinese Physics B, 2012, 21(2):023302.
[11] 姚洪斌, 李文亮, 张季, 等. K2分子在强激光场下的量子调控:缀饰态选择性分布[J]. 物理学报, 2014, 63(17):178201. Yao Hongbin, Li Wenliang, Zhang Ji, et al. Quantum control of K2 molecule in an intense laser field:Selective population of dressed states[J]. Acta Physica Sinica, 2014, 63(17):178201.
[12] Zhang Min, Wang Meishan, Xiong Delin, et al. The influence of femtosecond laser parameters on the wavepacket and population of the diabatic excited states of NaLi[J]. Molecular Physics, 2013, 111(1):61-71.
[13] Ma Ning, Wang Meishan, Yang Chanlu, et al. Theoretical study of the influence of intense femtosecond laser field on the evolution of the wave packet and the population of NaRb molecule[J]. Chinese Physics B, 2010, 19(2):023301.
[14] 马宁, 王美山, 杨传路, 等. 激光场强度对NO电子态粒子数布居影响的理论研究[J]. 物理学报, 2010, 59(1):215-221. Ma Ning, Wang Meishan, Yang Chuanlu, et al. Theoretical study of the influence of laser intensity on the population of the NO molecule electronic stases[J]. Acta Physica Sinica, 2010, 59(1):215-221.
[15] Wang Jun, Liu Fang, Yue Da Guang, et al. Influence of laser fields on the vibrational population of molecules and its wave-packet dynamical investigation[J]. Chinese Physics B, 2010, 19(12):123301.
[16] Meng Qingtian, Yang Guanghui, Han Keli. Time-dependent wave packet approach to rabi oscillation in strong laser field[J]. International Journal of Quantum Chemistry, 2003, 95(1):30-36.
[17] Meng Qingtian, Yang Guanghui, Sun Hailin, et al. Theoretical study of the femtosecond-resolved photoelectron spectrum of the NO molecule[J]. Physical Review A, 2003, 67(6):063202.
[18] Meng Qingtian, Liu Xinguo, Zhang Q G, et al. Time-dependent wavepacket approach to the influence of intense fields on the population of molecular excited states[J]. Chemical Physics, 2005, 316(1):93-98.
[19] Xiong Delin, Wang Meishan, Yang Chuanlu, et al. Control of reaction channels of CsI molecule by ultra-short laser pulse[J]. Chinese Physics B, 2010, 19(10):103303.
[20] Liu Chunhua, Meng Qingtian, Zhang Qinggang. Theoretical treatment of intense laser fields influence on the femtosecond time-resolved photoelectron spectrum of RbI molecule[J]. Chemical Physics, 2006, 326(2):344-348.
[21] Miao Xiangyang, Zhang Junfeng, Jia Xiangfu. Probing the process of photodissociation of the NaI molecule with pump-probe femtosecond spectroscopy[J]. EPL (Europhysics Letters), 2008, 82(3):33001.
[22] Arasaki Y, Takatsuka K, Wang K, et al. Studies of electron transfer in NaI with pump-probe femtosecond photoelectron spectroscopy[J]. The Journal of Chemical Physics, 2003, 119(15):7913-7923.
[23] Miao Xiangyang, Wang Lei, Yao Li, et al. Theoretical study of the femtosecond-resolved photoelectron spectrum of the anion[J]. Chemical physics letters, 2006, 433(1):28-31.
[24] Miao Xiangyang, Li Xin, Song Heshan. Probing wave packet dynamics of I2-anions with pump-probe femtosecond spectroscopy[J]. Chinese Physics Letters, 2008, 25(3):915-918.
[25] Schwoerer H, Pausch R, Heid M, et al. Femtosecond time-resolved two-photon ionization spectroscopy of K2[J]. Journal of Chemical Physics, 1997, 107(23):9749-9754.
[26] Sun Zhigang, Lou Nanquan. Autler-townes splitting in the multiphoton resonance ionization spectrum of molecules produced by ultrashort laser pulses[J]. Physical review letters, 2003, 91(2):023002.
[27] Zhang Hong, Han Keli, Zhao Yi, et al. A real time dynamical calculation of H2-photodissociation[J]. Chemical Physics Letters, 1997, 271(4):204-208.
[28] Xie Tingxian, Zhang Yang, Zhao Meiyu, et al. Calculations of the F+HD reaction on three potential energy surfaces[J]. Physical Chemistry Chemical Physics, 2003, 5(10):2034-2038.
[29] Hu Jie, Han Keli, He Guozhong. Correlation quantum dynamics between an electron and D2+ molecule with attosecond resolution[J]. Physical Review Letters, 2005, 95(12):123001.
[30] Chu Tianshu, Zhang Yan, Han Keli. The time-dependent quantum wave packet approach to the electronically nonadiabatic processes in chemical reactions[J]. International Reviews in Physical Chemistry, 2006, 25(1-2):201-235.
[31] Baumert T, Engel V, Meier C, et al. High laser field effects in multiphoton ionization of Na2. Experiment and quantum calculations[J]. Chemical Physics Letters, 1992, 200(5):488-494.
[32] Meier C, Engel V. Interference structure in the photoelectron spectra obtained from multiphoton ionization of Na2 with a strong femtosecond laser pulse[J]. Physical Review Letters, 1994, 73(24):3207.
[33] Zhang Caixia, Niu Yuquan, Meng Qingtian. Time-dependent approach to the double-channel dissociation of the NaCs molecule induced by pulsed lasers[J]. Chinese Physics B, 2014, 23(10):103301.