title: Transient Two-Dimensional Infrared Spectroscopy in a Vibrational Ladder.
abstract: We report on transient 2D Fourier transform infrared spectroscopy (2DIR) after vibrational ladder climbing induced in the CO-moiety longitudinal stretch of carboxyhemoglobin. The population distribution, spreading up to seven vibrational levels, results in a nonequilibrium 2DIR spectrum evidencing a large number of peaks that can be easily attributed to individual transitions thanks to the anharmonicity of the vibrational potential. We discuss the physical origin of the observed peaks as well as the qualitative behavior of the subsequent dynamics governed by population relaxation in the vibrational ladder.
authors: Laboratoire d'Optique et Biosciences, Ecole Polytechnique, CNRS, INSERM, Université Paris-Saclay , 91128 Palaiseau, France.
authors: Vincent
authors: V
authors: Kemlin
authors: Laboratoire d'Optique et Biosciences, Ecole Polytechnique, CNRS, INSERM, Université Paris-Saclay , 91128 Palaiseau, France.
authors: Adeline
authors: A
authors: Bonvalet
authors: Laboratoire d'Optique et Biosciences, Ecole Polytechnique, CNRS, INSERM, Université Paris-Saclay , 91128 Palaiseau, France.
authors: Louis
authors: L
authors: Daniault
authors: Laboratoire d'Optique et Biosciences, Ecole Polytechnique, CNRS, INSERM, Université Paris-Saclay , 91128 Palaiseau, France.
authors: Manuel
authors: M
authors: Joffre