Production of Cyclic Ozone
BOXCARS beam configuration
The objective of our research is the production of cyclic-ozone. Our hope is that the proper photonic reagent (pulse shape) will provide the necessary time dependent electric field to generate cyclic-ozone from its bent isomer. A pulse shaper, coupled with a genetic algorithm, will be used to seek out the proper pulse shape to perform the isomerization reaction. Detection will be performed using femtosecond CARS (Coherent Anti-Stokes Raman Spectroscopy), arranged in a folded-BOXCARS configuration. Significant progress has been made towards our goal of cyclic-ozone production. First, we have performed a detailed analysis of the electronic structure of the cyclic isomer. This analysis is essential for developing a proper detection scheme upon formation of the desired product. 
On the experimental side, we have investigated the signal (both resonant and nonresonant) generated from femtosecond CARS. This analysis has led us to develop a theoretical description which provides a means of obtaining the Raman line shape within a large nonresonant background as well as a complete description of the phase matching conditions for the folded-BOXCARS beam configuration.
Ozone production

We have optimized the production of bent ozone from oxygen using the aforementioned pulse shaping technology. In addition to being an experimentally less complex analogue to the production of cyclic-ozone, this experiment demonstrates the use of coherent control of a chemical reaction where a neutral (as opposed to ionic) product is detected as well as the viability of the experimental approach we have undertaken.

Read more about phase matching in femtosecond BOXCARS here.



Levis Group, Department of Chemistry, Temple University, Beury Hall 244, 1901 N. 13th Street, Philadelphia, PA 19122    Tel: 215-204-5241     Fax: 215-204-6179
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