Resonant uv pump-probe spectroscopy of dipicolinic acid via impulsive excitation Academic Article uri icon

abstract

  • We present experimental evidence of coherent wave packet motion in dipicolinic acid (C7 H5 N O4) which is an important marker molecule for bacterial spores. Resonant impulsive excitation is achieved by applying a uv pump pulse (267 nm, 16 fs) which has a duration that is shorter than the vibrational period of the molecules. The resulting dynamics is then probed with a weaker pulse of the same width and frequency. Evidence of the important "fingerprint" region for this molecule (between 1000 cm-1 and 1500 cm-1) is found in the transient absorption of the probe. We present simulations of the pump-probe experiment, based on the Liouville equation for the density matrix, and predict the optimal pulse width and detuning. 2008 The American Physical Society.

published proceedings

  • Physical Review A

author list (cited authors)

  • Murawski, R. K., Rostovtsev, Y. V., Sariyanni, Z., Sautenkov, V. A., Backus, S., Raymondson, D., ... Scully, M. O.

citation count

  • 5

complete list of authors

  • Murawski, Robert K||Rostovtsev, Yuri V||Sariyanni, Zoe-Elizabeth||Sautenkov, Vladimir A||Backus, Sterling||Raymondson, Daisy||Kapteyn, Henry C||Murnane, Margaret M||Scully, Marlan O

publication date

  • February 2008