Ultrafast vibrational dephasing dynamics of 9,10-bis(phenylethynyl)anthracene thin film revealed by femtosecond coherent anti-stokes Raman scattering
会议名称：《第十一届新型太阳能材料科学与技术学术研讨会》
会议日期：1000年
学科分类：07[理学] 08[工学] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
关 键 词：Ultrafast vibrational dephasing dynamics Coherent anti-stokes Raman scattering
摘 要：Ultrafast vibrational dephasing dynamics of 9,10-bis（phenylethynyl）anthracene （BPEA）thin films were revealed by femtosecond coherent anti-stokes Raman scattering spectroscopy （fs-CARS）.Dephasing times （T） of 2.60,2.98,3.72,and 1.64 ps were acquired at 1213,1300,1400,and 1478 cm vibrations,*** steady-state Raman and fast Fourier transform spectra,the dephasing dynamics generated by coherently excited Raman modes 1213 （1478） cm were fitted with 94 （77） cm quantum beat frequencies,with a combination of slow constantsτ=5.92 （2.76） ps and fast constantsτ=1.65 （1.98） *** lifetimes could be ascribed to the time scales associated with the structural changes for the C=C Raman modes in the BPEA thin ***,it is very significant to distinctly understand the underlying ultrafast vibrational dephasing dynamics of the electronic ground state of BPEA caused by vibrational structure changes,which benefits to improve sustainably the molecular device for efficient solar energy conversion.