Massachusetts Institute of Technology

Matthew F DeCamp

Andrei Tokmakoff

Preferred embodiments of the invention provide for methods and systems of 2D spectroscopy using ultrafast, first light and second light beams and a CCD array detector. A cylindrically-focused second light beam interrogates a target that is optically interactive with a frequency-dispersed excitation (first light) pulse, whereupon the second light beam is frequency-dispersed at right angle orientation to its line of focus, so that the horizontal dimension encodes the spatial location of the second light pulse and the first light frequency, while the vertical dimension encodes the second light frequency. Differential spectra of the first and second light pulses result in a 2D frequency-frequency surface equivalent to double-resonance spectroscopy. Because the first light frequency is spatially encoded in the sample, an entire surface can be acquired in a single interaction of the first and second light pulses.

Method and apparatus for two-dimensional spectroscopy

The invention relates to methods and apparatus for modifying the frequency characteristics of a spatially-dispersed mid-IR spectra for spectroscopy. In a preferred embodiment, sum frequency generation between a frequency-dispersed IR beam and an ultrafast optical pulse generates a spatially-extended optical signal that is collected with a CCD detector.

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Swarthmore, PA, United States of America

Matthew F DeCamp