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Photon Echo Peak Shift

3 Pulse Photon Echo Peak Shift is an insightful tool to investigate the dynamic interaction between the system and its surrounding environment. Specifically, this technique has been used to probe the dynamics of solvation, such as coupling to a protein environment. 

All 3 laser pulses can have the same wavelength (1-Color Photon Echo Peak Shift, 1C3PEPS), or one laser pulse can have different wavelength from the other two (2-Color Photon Echo Peak Shift, 2C3PEPS). The 1C3PEPS experiment signal is known to follow the transition frequency correlation function, which is usually interpreted as the system's capability to remember the initial transition frequency. This enables 1C3PEPS widely used for studying solvation dynamics in condensed phase. The signal from 2C3PEPS experiment has been used to extract molecular coupling between two chromophores and to find the correlation between the initial and final transition frequencies. 

3PEPS

Helpful Background Reading:

Coherence Dynamics in Photosynthesis: Protein Protection of Excitonic Coherence, H Lee, Y-C Cheng, and GR Fleming. SCIENCE 316 (5830): 1462-1465 JUN 8 2007.

Measuring Electronic Coupling in the Reaction Center of Purple Photosynthetic Bacteria by Two Color Three Pulse Photon Echo Peak Shift Spectroscopy, DY Parkinson, H Lee, and GR Fleming. J. Phys. Chem. B.; 2007; 111(25); 7449-7456.

Two-Color, Three Pulse Photon Echo Peak Shift Spectroscopy , R. Agarwal, B. S. Prall, A. H. Rizvi, M. Yang and G. R. Fleming. J. Chem. Phys. 116, 6243 (2002).

Third-Order Nonlinear Optical Response and Energy Transfer in Static Disordered Systems , M. Yang and G. R. Fleming. J. Chem. Phys, 113 (7), 2823-2840 (2000).