WARF TECHNOLOGIES

A UW-Madison researcher has developed an improved method and associated system for coherent multidimensional spectroscopy (CMDS). CMDS is based on the formation of Schrӧdinger cat states by exciting multiple vibrational and electronic states in a target entity on time scales (e.g., picoseconds, femtoseconds) that are short (or comparable) to the timescale over which multiple quantum coherences (MQCs) decay. This is accomplished by temporally and spatially overlapping ultrafast coherent excitation beams in a sample containing the target entity. The central feature of this discovery is synchronized scanning of all the coherent excitation sources so that the phase matching does not change or drift.  Essentially, the system will be capable of independently modulating the wavelengths of each light source, so that an increase in one can be offset by a reduction in another.  

Using this method of synchronized scanning, CMDS-derived spectra could be acquired using a series of correlated scans of multiple wavelengths such that the resulting data set would define the response of a sample to all combinations of the wavelengths.  The resulting spectra could be interpreted in a traditional manner while providing enhanced resolution. 
 

For More Information About the Inventors

• John Wright

Tech Fields

• Analytical Instrumentation, Methods & Materials : Spectroscopy