The adsorption of hydrogen on indium phosphide (100)-surfaces was investigated with Fourier-transform infrared (FTIR) spectroscopy in UHV. In particular, the vibrational absorption bands of the MOCVD-prepared phosphorus-rich ordered surface - where
according to DFT calculations by Schmidt et al. the surface unit cell contains two P-H bonds - were investigated with FTIR spectroscopy and the postulated P-H bonds were confirmed. The measured FTIR spectra of P-H bonds formed upon exposure to atomic
hydrogen motivated a new search for additional surface reconstructions. Indeed, corresponding DFT calculations by Hahn and Schmidt confirmed new structures as thermodynamic stable. The FTIR spectra of P-H bonds were analysed by applying the macroscopic
three-layer model and the microscopic theory for dipole-dipole interaction.