Optical Multidimensional Fourier Transform
讲座名称：
Optical Multidimensional Fourier Transform
讲座时间：
2012-03-28
讲座人：
李鹤槟
形式：
校区：
兴庆校区
实践学分：
讲座内容：
Title：Optical Multidimensional Fourier Transform
SpectroscopyAbstract：The concept of multidimensional Fourier transform spectroscopy originated in NMR where it revolutionized NMR studies of the structure and dynamics of biomolecules and led to the Nobel Prize in chemistry in 1991. In the past decade, the same concept has been implemented in the optical region with femtosecond lasers. In the experiments,the nonlinear response of a sample to multiple laser pulses is measured as a function of delays and a spectrum is generated by a multidimensional Fourier transform. Migrating multidimensional Fourier transform spectroscopy to the infrared and visible regimes is difficult because of the need to obtain full phase information about the emitted signal and for the phase difference between the excitation pulses to be stable and precisely incremented. I will give an introduction to optical multidimensional Fourier transform spectroscopy and then discuss its applications to study atomic vapors and excitons in semiconductor nanostructures. A multidimensional spectrum can unfold a congested 1D spectrum to isolate quantum pathways, thus provides unambiguous information of the system dynamics such as couplings, homogeneous and inhomogeneous linewidths. I will present 2D spectra that reveal valuable insights into many-body physics in both atomic vapors and semiconductors, and 3D spectra that can be used to determine the Hamiltonian of complex systems.
时间：3月28日 16:00～18:00
地点：西安交大物理学科多媒体报告厅（中1-3113）
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