Coherent vibrational climbing in carboxyhemoglobin - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2004

Coherent vibrational climbing in carboxyhemoglobin

Résumé

We demonstrate vibrational climbing in the CO stretch of carboxyhemoglobin pumped by midinfrared chirped ultrashort pulses. By use of spectrally resolved pump-probe measurements, we directly observed the induced absorption lines caused by excited vibrational populations up to v = 6. In some cases, we also observed stimulated emission, providing direct evidence of vibrational population inversion. This study provides important spectroscopic parameters on the CO stretch in the strong-field regime, such as transition frequencies and dephasing times up to the v = 6to v = 7 vibrational transition. We measured equally spaced vibrational transitions, in agreement with the energy levels of a Morse potential up to v = 6. It is interesting that the integral of the differential absorption spectra was observed to deviate far from zero, in contrast to what one would expect from a simple one-dimensional Morse model assuming a linear dependence of dipole moment with bond length.

Dates et versions

hal-00324462 , version 1 (25-09-2008)

Identifiants

Citer

Cathie Ventalon, James M. Fraser, Marten H. Vos, Antigoni Alexandrou, Jean-Louis Martin, et al.. Coherent vibrational climbing in carboxyhemoglobin. Proceedings of the National Academy of Sciences of the United States of America, 2004, 101 (36), pp.13216-13220. ⟨10.1073/pnas.0401844101⟩. ⟨hal-00324462⟩
173 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More