Ultrafast infrared response of adsorbates on metal surfaces: Vibrational lifetime of CO/Pt(111)

Abstract

A picosecond time-resolved infrared technique has been used to measure the transient response of vibrationally excited CO adsorbed on the surface of a Pt(111) single crystal. Transient bleaching signal decay is interpreted as giving ${\mathit{T}}_{1}$ for damping of vibrationally excited CO. Transient absorption is discussed in terms of transitions from the excited adsorbate band to overtone levels.