多维傅里叶变换光谱

Optical Multidimensional Fourier-transform Spectroscopy

二维或多维傅里叶变换谱的概念最早是在核磁共振(NMR)谱学中提出的,随着激光技术的发展,飞秒脉冲激光的实现使多维傅里叶变换谱的概念被引入到了光学领域,以脉冲激光代替NMR中的射频(RF)场,激光波长从红外延伸到可见光波段。多维傅里叶变换光谱可以同时提供的信息包括量子态上布居数以及量子态间的耦合,所以多维谱可以提供一维谱所无法获取的反映量子系统演化动力学的信息,如量子系统中的能量转移以及分子间的相互作用等。人们使用多维傅里叶变换光谱的方法对碱金属原子、量子阱、分子等量子系统中的动力学过程进行了一系列的研究。

The concept of two-dimensional or multidimensional Fourier-transform （2DFT or MDFT） spec- troscopy originated from nuclear magnetic resonance （NMR） spectroscopy, the development of femtosecond laser technology allows the MDFT spectroscopy to be extensively implemented in the optical region in recent years, where the conventionM radio frequency （RF） field in the NMR is replaced by pulse lasers with wavelength ranging from infrared to visible domain. The opti- cal MDFT spectroscopy can be used to identify the population of each quantum state and the coupling between quantum states, thus to determine the evolutionary dynamics of quantum sys- tems, such as energy transfer in quantum systems and molecules interactions, in addition to the information obtained from one-dimensional spectroscopy. The optical MDFT spectroscopy has been successfully applied in the studies of a variety of quantum systems including alkali atoms, quantum wells, molecules, etc.