We propose a strategy of using a stochastic optimization technique, namely, simulated annealing to design optimum laser pulses (both IR and UV) to achieve greater fluxes along the two dissociating channels (O18 + O16O16 and O16 + O16O18) in O16O16O18 molecule. We show that the integrated fluxes obtained along the targeted dissociating channel is larger with the optimized pulse than with the unoptimized one. The flux ratios are also more impressive with the optimized pulse than with the unoptimized one. We also look at the evolution contours of the wavefunctions along the two channels with time after the actions of both the IR and UV pulses and compare the profiles for unoptimized (initial) and optimized fields for better understanding the results that we achieve. We also report the pulse parameters obtained as well as the final shapes they take.
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14 October 2015
Research Article|
October 12 2015
Enhancing the branching ratios in the dissociation channels for O16O16O18 molecule by designing optimum laser pulses: A study using stochastic optimization
Srijeeta Talukder;
Srijeeta Talukder
1Department of Chemistry,
University of Calcutta
, 92 A P C Road, Kolkata 700 009, India
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Shrabani Sen;
Shrabani Sen
2Department of Chemistry,
Rammohan College
, 102/1, Raja Rammohan Sarani, Kolkata 700 009, India
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Bhavesh K. Shandilya;
Bhavesh K. Shandilya
3Department of Chemistry,
Indian Institute of Technology Bombay
, Powai, Mumbai 400 076, India
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Rahul Sharma
;
Rahul Sharma
4Department of Chemistry,
St. Xavier’s College
, 30 Mother Teresa Sarani, Kolkata 700 016, India
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Pinaki Chaudhury;
Pinaki Chaudhury
a)
1Department of Chemistry,
University of Calcutta
, 92 A P C Road, Kolkata 700 009, India
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Satrajit Adhikari
Satrajit Adhikari
b)
5Department of Physical Chemistry,
Indian Association for the Cultivation of Science
, Jadavpur, Kolkata 700 032, India
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a)
Electronic mail: pinakc@rediffmail.com
b)
Electronic mail: pcsa@iacs.res.in
J. Chem. Phys. 143, 144109 (2015)
Article history
Received:
July 02 2015
Accepted:
September 21 2015
Citation
Srijeeta Talukder, Shrabani Sen, Bhavesh K. Shandilya, Rahul Sharma, Pinaki Chaudhury, Satrajit Adhikari; Enhancing the branching ratios in the dissociation channels for O16O16O18 molecule by designing optimum laser pulses: A study using stochastic optimization. J. Chem. Phys. 14 October 2015; 143 (14): 144109. https://doi.org/10.1063/1.4932333
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