Mode Selective Excitation Using Coherent Control Spectroscopy
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400094 (India)
- School of Engineering and Science, Jacobs University Bremen, Bremen, 28759 (Germany)
Femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) gives access to ultrafast molecular dynamics. However, femtosecond laser pulses are spectrally broad and therefore coherently excite several molecular modes. While the temporal resolution is high, usually no mode-selective excitation is possible. This paper demonstrates the feasibility of selectively exciting specific molecular vibrations in solution phase with shaped fs laser excitation using a feedback-controlled optimization technique guided by an evolutionary algorithm. This approach is also used to obtain molecule-specific CARS spectra from a mixture of different substances. The optimized phase structures of the fs pulses are characterized to get insight into the control process. Possible applications of the spectrum control are discussed.
- OSTI ID:
- 21254885
- Journal Information:
- AIP Conference Proceedings, Vol. 1075, Issue 1; Conference: ICOPVS 2008: 2. international conference on perspectives in vibrational spectroscopy, Thiruvananthapuram, Kerala (India), 24-28 Feb 2008; Other Information: DOI: 10.1063/1.3046229; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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