Broadband two-dimensional electronic spectroscopy in an actively phase stabilized pump-probe configuration

摘要: We introduce a novel configuration for two-dimensional electronic spectroscopy (2DES) that combines the partially collinear pump-probe geometry with active phase locking. demonstrate method on solution sample of CdSe/ZnS nanocrystals by employing two non-collinear optical parametric amplifiers as pump and probe sources. The pulse replicas are created using Mach-Zehnder interferometer stabilized feedback electronics. Taking advantage separated paths pulses in interferometer, we improve signal-to-noise ratio double modulation individual beams. In addition, quartz wedge pair manipulates difference between pulses, enabling recovery rephasing non-rephasing signals. Our setup integrates many advantages available 2DES techniques robust stabilization, ultrafast time resolution, two-color operation, long delay scan, polarization manipulation ease implementation.