作者: Brantley A. West , Brian P. Molesky , Paul G. Giokas , Andrew M. Moran
DOI: 10.1016/J.CHEMPHYS.2013.06.027
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摘要: Abstract Nonlinear laser spectroscopies in the deep UV spectral range are motivated by studies of biological systems and elementary processes small molecules. This perspective article discusses recent technical advances this area with a particular emphasis on diffractive optic based approaches to four-wave mixing spectroscopies. Applications two classes illustrate present experimental capabilities. First, experiments DNA components at cryogenic temperatures used uncover features excited state potential energy surfaces vibrational cooling mechanisms. Second, sub-200 fs internal conversion coherent wavepacket motions investigated cyclohexadiene α-terpinene. Finally, we propose new directions that combine methods for producing few-cycle pulses noble gases incoherent detection (e.g., photoionization) time resolution near singlefemtosecond. These measurements knowledge extremely fast non-adiabatic dynamics electronic